I have said, "The television is like a garbage disposal in reverse- you turn it on, and the contents of the sewer beneath your house comes pouring forth into your living room..."
The basic problem with virtually all the media is that it is a vehicle used to sell you something- it's driven by advertising, so it needs to get and hold your attention long enough that you will sit still for the ads that follow.
And what is the quickest way to do that?
Cheap sleaze.
Bright colors.
Tits, teeth, and asses.
Explosions and fire.
Lots of white noise.
Everybody on the screen moving around like they have Saint Vitus' Dance.
Teeth?