Because your simple point isn't a point at all.

You're trying to make a direct correlation between what you call a "meaningless" economy and "having less to do". But, like I pointed out already, FFXI had what you wanted yet it also had players sitting on mountains of gil without anything to spend it on too.

If the game had crafted i110 gear, AND the materials weren't hidden behind lockouts, you'd have the exact same problem after you crafted all your stuff. But even FFXI had pretty severe lockouts for materials (way worse than the lockouts we currently have on obtaining gear).

I'm all for making crafting have a bigger role in endgame, which is why I believe that the best gear should have an endgame drop component and a crafting component. But your argument that forcing players to only have one crafting class leveled would lead to "having more stuff to do" is simply ridiculous.