Here is a great article on the topic of horror as a genre. I myself am a closet-fan of horror films. I love them. I agree that there are a lot of dumb, pointless movies in this genre (as with every other one) but there are also some real gems that speak to about our culture of materialism, greed, power, narcissism, in contrast to our human desires for forgiveness, redemption and salvation. And some are just so much fun to watch!
RELEVANT Magazine - The Redemption of Horror?