In horror movies, wouldnt you rather get to know the murderer as a person rather than some guy behind a mask?

Dont you think getting to know someone is infinitely more pleasing than to meet some guy behind a hockey mask, or in a puppet suit, or whatever?There is always the moment when the killer is unmasked and spews out his bitterness and hate and vindictive triumph over his would-be victims. This is unsatisfying, no? How about just once, at the crucial moment, the killer gets squished under something, and we never do find out who he was?