Why doesn't he get a job to support his son?
Thats what most people do. They don't rob banks.
shareBecause he's never done anything else than motorbikes in his life, his woman and child are settled in *beep* town and no matter what he does, there's no way he'll provide more for them than the dude he's already settled with.
Plus he's lived all his life on adrenaline, he can't just turn a switch and turn into someone completely different doing a "normal" job.
Finally, there's nothing wrong with robbing banks as long as you don't hurt someone in the process.