Some people are concerned because, as stated above, the end-game drops apparently have better enchants/traits than crafted gear. I don't doubt this, because if crafted gear was hands-down better than anything dropped, what incentive would people have to raid aside from storyline? Along the same lines, this philosophy is true for most games, so it shouldn't come as a surprise, either.
The developers did say that anything can be upgraded to Legendary status, and that upgrade can only be done through the crafting system. While it's true anyone can do the boost, a non-crafter will need 20 boosters per item to make a legendary, whereas a level 30+ crafter will only need 8. So crafters will either make a fortune selling the booster items needed to create legendaries (they also said the boosters do not drop from chests, loot, barrels, etc; they only come from crafter-related abilities), or charge non-crafters a tremendous fortune to click the upgrade button on any BoE item. Sure, you might not be able to create the ultimate helmet in the game, but you can likely charge 10,000g (random guess based on server economy, but given gold income rates at 50+, not a horrible estimate) per Legendary booster easy at the start of the game. Multiply that by 20 for the non-crafters, and you're looking at obtaining a small fleet of horses just from selling boosters. I would bet that someone looking to upgrade a BIS and who doesn't want to buy 20 boosters would love for you to click that upgrade button for a mere 50,000g if they provide just the 8 boosters (would save them 70,000g if you did). And of course, factor in bad luck for slots during the gear-up process (maybe that end-game raider just had horrible luck with leggings, and needs a strong pair to farm Adventure Zones), and I think there will still be a small market for finished non-Legendary goods.
My take on it: crafters will still have a market at endgame. Selling Legendary boosters, selling Legendary upgrades to BOEs for those who provide boosters, selling occasional epic V10 level gear to unlucky raiders, and selling level 50 items for Extraction (powerlevelling items) will all be moneymakers. In addition, not everyone raids...there will still be a portion of the playerbase whose best-in-slot items will likely be crafted gear. Plus, there's probably going to be new set bonuses and new traits in the future (in an expansion, if not in a patch) so there's really no telling if set bonuses will remain worthless in the future. I really, honestly, don't believe crafting is "broken" at all. In fact, Provisioning, Enchanting, and Alchemy all stand to be huge moneymakers at all points in the game.
If you like crafting, do it. It's really fun in this game. If it ends up profitable, awesome. If not, hey, at least you had fun doing it (and likely you made yourself some neat gear along the way)!
--Myrron