That depends on whether you're a pack rat, like I am. If I go into an area I like to haul out everything of value, and I don't want that to require half a dozen trips. With max Strength and the Strong Back perk, I can pretty much do it all in one go, and don't have to take the time to go back to an area to pick up any loot I couldn't carry out the first time.
That's all very nice, but the point is, non-maxed intelligence means permanently lost skill points that aren't ever coming back. Going with 5 strength + strong back until Almost Perfect at level 30 means absolutely nothing lost. Well, maybe a bit of loot over the course of the game but nothing significant, and it's not like anyone's likely to be running out of caps anyway.
Plus maxing Strength gives me extra points in Melee, so that's extra skill points I don't have to invest in.
That is probably the worst reason you could give to invest in strength. It's a one-time bonus of +2 skillpoints per point spent in strength. Even without Broken Steel, every point spent in Intelligence at char creation is 19 skillpoints PLUS a further +2 to science, repair, and medicine, three skills you're almost certainly going to want to invest in anyway.
In economics there's a principle called opportunity cost. When you make a choice, any choice really, there's a number of options you didn't go with. When you're considering the gain of whatever choice you made, you can't simply compare it with not having made a choice at all. You must always, always, ALWAYS compare it with the possible alternatives, meaning the opportunities you decided not to go with. That lost opportunities is also part of the price of your action. If you spend your money on apples then you can't also spend them buying oranges. Every apple bought is thus a lost orange.
Skipping economics and getting back to the point you tried to make, you're seeing benefit from gaining 8 skill points in melee from investing 4 points into strength for 9 total. True, that is a bonus from investing in strength, but that bonus is something like a third of what you'd have gained from investing just
a single point more in intelligence. The opportunity cost is staggering. No offense meant, but your reasoning simply isn't sound in the above quote.
My first run through I took both of them, and even though my Intelligence wasn't maxed, only 8 with the Bobblehead, it didn't take me long before I had all my main skills maxed. After that leveling up became an almost pointless exercise since all I had left to invest in were skills I didn't use anyway. It made for a very boring game at that point, one which I finally gave up on.
The levelling mostly is pointless anyway, at least if you've got Broken Steel. There's way too few quality perks so you're not really making hard decisions anyway. Toughest choice I had to make was whether to go with chemist or fast metabolism at 29. Kind of telling, I should think.
As far as skills are concerned, Comprehension really is a good boost. If you're suffciently determined, you really just want to bring all skills to ~45, with the bubblehead adding +10 and books doing the rest. Problem is, getting all those books is freaking annoying and you really want a few skills up high ASAP. Repair to 100, lockpick, your main weapon skill, medicine, maybe sneak too, science. That's easily 5-6 skills that you'll want to raise from a fairly low starting point. Say you want to add 60 points to all of them. Even with 10 int that's 15-18 levels we're talking about. Unless you're playing it smart and using Comprehension and bubbleheads to help out somewhat. And keep in mind that then barter, speech, and explosives will still be left at very low levels.