Don't really agree.
Procuring items or alternatively making profit to buy said items is part of what crafting is about.
What I would agree to is if they made the quests so the the items have to be crafted/gathered by the player.
That would prevent people from just buying all the levequest items for turning in... though on the flip-side, this would ruin the leve-turn-in selling which is a good market for people that aren't at the top of crafting yet.
Same with your suggestion - it would take away that venue from crafters, to sell HQ items used as leve turn-ins. Back when I was levling my crafters, this was the main thing that I made enough profit with to cover my spending on mats.
Of course there's glamour prisms.. but those are just a huge undercutting game.