Entertainment Tonight will give you Tom Cruise on the red carpet, they will give you gossip, they will give you what the new releases are this week. ET doesn't talk about the director, won't give any time to the co-star, and is not going to dig deep and analyze Hollywood's inner workings.
SportsCenter is ET. They'll give you Lebron, they'll give you Tiger, they'll give you Tebow. They'll have "experts" give shallow analysis of surface level stories. They'll give you scores, but only the scores of the "big games". You aren't getting a Mariners/Blue Jays highlight, just like ET isn't giving you the director of a movie breaking down why they cut a scene. They'll show you Master's clips, but mostly Tiger (no matter how far back he is) and maybe a shot or two of the leader sinking an easy put, just to shoehorn him in.
It's drive by, populist sports coverage. It has zero depth. It isn't for us. It's for the guy who couldn't tell you a player on the Heat not named Lebron or Wade, or name a golfer aside from Tiger. It's for the guy who watches 2 hours of sports per week on the weekend. And they do a great job catering to that guy.