For some things, yeah. But for the most part, No, college isnt necessary.
I make over a hundred grand a year and i dont even have my grade 12, but i also live in a place that has huge demand for work so it's easy to start up a company and get business here, a lot of places in the world dont have the same opportunity here.
It all depends on your field too. Petroleum Engineers and Doctors should have to go to school, you need that extra knowledge, whereas artists dont need any schooling whatsoever. You can go get hired by disney and pixar to do their movies and cartoons if you built up a portfolio of artwork that relates to what they do without having to spend a single minute in a college or university (and of course it was good, but university doesnt teach you any super secret art tricks that you cant learn from a 5 minute online free tutorial). Basically anything in the arts can be done without post secondary school period.
Now a days, I honestly think we dont even need a physical college/university campus. Stuff that needs hands on training (Doctors or chefs) can be done in much smaller facilities. An intern doctor can learn much quicker about their field if they tagged along in an actual hospital or doctor's office rather then in a university. Most classes in school dont use hands on training as it is.
The only thing keeping Universities and Colleges running now is because they have turned into big money businesses, tuitions across north america have increased WAY beyond that of inflation because there's a huge demand for colleges and universities because of the mentality kids are taught at a young age that "you have to go to post secondary for the sake of going to post secondary" which is bogus.
Not to mention there are way too many useless classes like Women's Studies (nothing against women or feminism but women studies is a useless degree that gets maybe 100 people in all of north america jobs as the manager of a YWCA), Music studies (again, useless degree, i can learn just as much as someone doing music studies on my own time on the internet while smoking a joint after work without paying tens of thousands of dollars and being in debt for a majority of my life), Philosophy (honestly, what the hell kind of job do you get as a philosopher? who hires a philosopher now a days? It was a useless job 500 years ago, it's still useless. Even if you do find a decent job with that degree, how many of those jobs are out there? Not more then there are people graduating that class, that's for sure).
Then on top of all of that, you get the bureaucracy that runs the universities, that it doesnt matter what you know anymore, it's Who you know. A friend of mine just graduated from Mcgill University in Montreal a year ago as a Mechanical Engineer and moved back here to Calgary (the booming city of Canada) and he cant find a job with his 4.0 GPA, whereas he knows other people who graduated with him who spent all their school time partying and have [censored] grades (he even said one guy had a 2.0 GPA, the lowest you can get without failing) and they all got jobs because their parents were Engineers.
Hell my friend even said when he goes to apply for engineer jobs, the main questions on their applications are "Do you have any family that are Mechanical Engineers?", which shouldnt mean jack [censored]. That's like saying that hey, I can fly airplanes no problems because both my grandpa and Dad got their pilot's license (my dad got his at 16 years old), despite the fact that i know nothing about flying besides flying airplanes in GTA and battlefield.
Then you got high profile universities, like Harvard which is supposed to be the best of the best law school in north america, yet the last few Harvard graduates that have been in politics here in Canada have been stone cold stupid, yet with the air of intelligence around them, thinking they're smarter then all the dumb ass hicks because their parents paid 300 grand for their schooling.
Good examples of that are Alison Redford (Premier of Alberta who got punted out of office for her sense of entitlement and using tax payer dollars to do whatever the hell she wanted, spending 16,000 taxpayer dollars on a one night stay in chicago and so much more, yet whenever she talked about these issues she always brushed them off like we were a bunch of [censored] rednecks who dont know the big picture in life - that big picture i guess being that we are the peons and the harvard graduates are better then us in every way imaginable), or Michael Ignatieff (who was brought in to be head of the liberal party of canada - canada's most ruling party in the last 50 years - to run against stephen harper and all his stupid moves ended up losing the liberal party 100 seats out of a grand total of 306 for the entire country leaving them with 30 seats left and they even lost their official opposition status, but he thought he was smarter then us and was brought in as a super intellect who was going to put canada straight).
As far as im concerned, a Harvard degree means you're a stone cold idiot IMO (which is obviously not the case for most people, but the way the bureaucracy has been running it, will eventually come to fruition for a majority of harvard graduates, especially when graduating depends on how much money you got, rather then your own merits).
Universites have turned into bloated money grubbing elitist campuses, that squash out any opposing views to their narrative and frankly, are against the furthering of knowledge of mankind because you cant dare say anything against the crap that they are promoting without being silenced by them, even if you have cold hard facts that show what they are teaching is blatantly wrong.
What's the opposite of Diversity? University.