Because Greg Graffin and his index finger have a PhD in biology...
And Milo Aukerman has a PhD in biochemistry.
And Dexter Holland was a PhD candidate before the Offspring hit big in 1994.
The only famous country singer with anything better than a Bachelor's degree is...
Garth Brooks, with a Master's in Advertising and Marketing. Pop Country of the 90s makes a lot more sense now, doesn't it?