The problem isn't DoL gathering too many materials per swing, nor is it DoH not requiring enough materials. The real issue is that there are thousands of gilsellers botting all levels of gathering points via teleportation hacks, flooding the markets on all servers constantly and incredibly quickly. Nothing is currently stopping the gilsellers from doing this. Sure, the level 1 "spammer characters" in town may be getting banned regularly, but the ones gathering the materials to get the gil to sell are freely able to work without any risk, as they use the public Market Boards to gather their gil; and obviously SE can't ban the buyers of their materials.

I guarantee you if SE actually took care of the bots on a daily basis (as opposed to apparently never) the market would be demanding all materials like crazy. Take this opportunity to level a DoH, because once (if) SE actually gets off their ass and starts banning on a regular basis, prices for materials will skyrocket.