It's a function of the 'blockbuster' mentality which began with Jaws but really took off with the Simpson/Bruckheimer films, a generic product that communicates to a fairly low common demonimator. You're going to find a lot of these type of scores around, but if you poke around you'll find stuff to enjoy as well...
Also as mentioned don't forget that you are generally writing to a brief given by non musicians who often want stuff they can understand.