I hate to be cynical, but I'd say it's a good thing you're only playing the game two days a week. I mean, do you really want to be addicted to the game, playing it 5-6 hours a day when you could be doing more productive things?
Also crafting isn't useless. Yeah, it's pointless if you were doing it to gear yourself out, but it's not pointless if you use it to make gil. I guarantee you that all of the super rich people on your server are people who have maxed every crafting and gathering class.