It's hard as it is to guarantee HQ on items you're not leveled/geared enough for. This means you spend lots of gil just to gear up, or if you end up maxing several crafts just to make it yourself, spending lots of gil to get there quickly. And the longer you wait to get into the market with all the ridiculous undercutting, the less your chances of making money, and the less money you have the less likely you'll get to that point of "easily" churning out HQ product.

The problem isn't HQ vs NQ, it's the undercutting that causes crafted items to sell for way less than it costs to make them and that all crafts are—without any changes to the way crafting or the market boards work—doomed to become a vanity project in this trend.

The ilvl50+ items need to be HQ to even compete with all the AF/DL/drop equipment and that's WITH materia melded. If made artificially rare, prices skyrocket with nobody earning gil to buy them and people give up on them and use nothing but what they grab on dungeon runs or can buy with tomestones.