Villain Movie

There is an abundance of movies and movie franchises with superheroes as central characters.  A large majority of these heroes emerge after some form of tragedy (often a family one).  Bruce Wayne's parents are murdered, Batman is born.  Tony Stark is attacked and held captive, Iron Man is born.  Matt Murdock discovers his father is a mob thug causing him to get in an accident, Daredevil is born.  Peter Parker's Uncle is killed, Spider-man is born.  Britt Reid's father dies, Green Hornet is born.  But in reality don't many children become disobedient, get into drugs and generally misbehave in what ever ways possible after they experience tragedies like a parent's death, divorce, et cetera?  I constantly hear of studies saying that these events can cause kids to become criminals in later life, or other similar concepts.  Then why do these characters fight for justice?  There needs to be more villain movies.  Bruce Wayne's parents die and he kills thugs turning into a full blown serial killer or Tony Stark decides to use his Iron Man suit to way war on the country whose people held him captive.  These plots may make for really dark films, but it gives plenty of opportunity for redemptions or other perspectives.  Obviously no one wants to taint these heroes names, but with all the sequels, remakes and adaptations in Hollywood, some originally can't hurt.  Not wanting to be original and create a villain with his own world and back story is no excuse for not making villain films though.  Why is there not simply a reverse perspective superhero movie?  For example, the Dark Knight shown from Joker's perspective.  Feature Batman as a secondary character and focus on Joker's story and his inner struggles.  That might not be the best example, but eventually people will get tired of going to see sequel upon sequel.  Mix it up once it a while, the number of heroes out there is running low.  Even do some sidekick spin-off films if you have to (I mean, Kato is where all the action is in Green Hornet).  I'm sure people would watch a Robin movie.  He even comes with more developments for future superhero movies (i.e. Nightwing).  Why bore audiences with one hero development film followed by sequels with new enemies when you can progress from normal person to sidekick to superhero?  It's no secret studios love blockbuster franchises, and the more character development, the more sequels, thus more box office winnings.  Nonetheless, I'm still going to watch every one of the superhero movies that come out.