Profitable crafting according to several statements made by Yoshi will not lead to a profitable system.

The Value of gil will continue to be watered down.

When the Glamor additions come into play or housing items gain any demand the method of making gil from it will quickly be squashed in order to stamp out RMT.
RMT Limitation will insure crafting will remain a side item in the game and instead will introduce newer non tradable goods and currencies, leaving gil for the low valued glamore, housing and food.