Hey Because, there's been loads of good stuff on telly that deal in real emotions. Check out work by Mike Leigh for starters. More lately, maybe the Sopranos.
Have ever seen those bits in the middle of The Sopranos? They're called ad breaks. Without enough companies wanting their ads in that airtime, no US tv show would ever be made.
(PS Didn't that band who did the Sopranos theme music have a hit single off the back of it?