The issue with crafting is that everything costs money, but all of the crafters who reached the highest tiers first have all of the moneymaking synths on lockdown. It's very difficult to make enough profit to afford the millions of gil required for 1-star or higher level 60 skill. The moment you find a good money maker another, richer crafter will find and exploit it leaving you in the cold. Vanity is the true endgame, afterall.