Because people buy it. That's it. You might not like it, I might not like it, but enough people like it for him to make a career out of it.
Bingo. There's a cultural problem here right? Just as once you had regular people like Memphis Bleek being forced into rapping like gangsters you have regular dudes from the south being forced to rap someone else's mindset..
I also see parallels to older pre-50s generations of black entertainers being forced to dumb down their ideas and speech...
I'll ask you this, what would be different if he dropped out of college, was a bad student in college, or dropped out of high school?
His expression would be in line with what's actually in his mind..
I also think there is very selective calling out of rappers on these kinda "aligning your life with your rap" things .. or maybe it's in the current era nothing matters whereas in the past it could