It's politically safe to laugh at White men.
I totally get your point, but I think it's popular and funny because it mostly IS true! I don't have any (close) black dad friends, but my white buddies are all esteemed professionals until they come home! At that time, anything goes. My dad was a highly respected District Court Judge, nominated to Reagan by Senator Armstrong for the Supreme Court, but at home he was Silly City! Gawd I miss him!