>>4948458Probably socioeconomic status. Having parents that support doing art seriously is a lot more likely if they don't picture you starving down the road. You're more likely to be in a situation conducive to learning, more likely to be in a school that will have at least decent arts programs for electives. You're more likely to have the emotional support to continue when you're discouraged. I'm sure there's a genetic component but I have no idea how you'd quantify that. You get an enormous boost from those things, sure, but if you don't have the drive to get through the hard parts you're going to quit, and it's probably a lot easier to quit if you know you're going to be financially OK no matter what.