Fresh prince wasn't supposed to be comedy show at the time.To be honest, I always thought the Fresh Prince was a product of revisionist history. Not saying it wasn't good or that it didn't have some popularity. However, I don't think it was as popular as everyone seems to be thinking it was.
I never got the impression it was considered must see tv.
That's why you see a spin-off of it on peacock (bel-Air) which is the direction Fresh prince should've went back then.