There really wasn't crafting in the original GW.
Devs have said they're more about horizontal (becoming more versatile) than vertical (stats go up) progression, so IMO this ties into that. In the original GW people paid very high sums for a weapon that was no better than others (or armor) but had a rare, cool skin. It was a status symbol of sorts. If there are cool skins only available to crafters, there will be a market for that.
The other side of this (and here I'm speculating) is that perhaps a crafted set will offer, say, high crit chance so if that's what you want to focus on, you'll want to buy this crafted set. Or more defense, or higher health, etc. Or maybe rather than do PvP or go dungeon crawling, you'd rather just make money and buy gear. I think they want to offer options for all those playstyles
