Don't forget that shaving was not the norm even in western countries until relatively recently - just look at the earlier issues of Playboy and Penthouse. Shaving was rare in Eastern Europe before the fall of communism. When I visited Hungary in the 1990's, many ladies there did not even shave their armpits.
I blame the porn industry for giving people the impression that bald is the norm.
I don't think anyone thinks it is the norm. I do know that each of us likes different things. I for one appreciate a lady who takes the time to look her best for me.