The media sensationalizes everything it can get its hands on because that is what average dummy on the couch with a Budweiser after a hard day's work is entertained by, with a focus on:
Sex
Guns
Drugs
Explosions
Scandal
Dinosaurs (reptiles)
Freaks
Epidemics
Lawmakers are as dumb as the average schmo or dumber. We have a society that at this point doesn't really need much core tinkering to run. Since their jobs as lawmakers are to make rules and buzz around what should or should not be everyone's business and expected behavior within the society, these are the things they choose to mess around with.