I level craft's to equip my classes. Did you by chance read the 2nd paragraph of that post?

Anyways if a casual player is worried they won't have the Gil to buy mats to grind on, I would think, (if they really wanted to craft that is) they would pick up a gathering class. To either supply their craft. No?

With harvesting, boring as it may be, is 1000% more plentiful than in xi, gathering is casual player friendly. There is also the local leves to rank up your class, like I posted before I rank up to at least ~r30 via local leves. Free mats to grind on, and mats for future grinding. Hell rank up DoM/DoW to r50 and youll make 100k a week easy via leves, and drops.

If they decide to go with an auto leveler (which I highly doubt) there is no reason a casual player could not level a craft. There will always be multiple paths to get things done involving this game.