Broadcast Noise

I understand that the fans play an important role at athletic events, like football and hockey games. I understand that the crowd noise can be an advantage to the home team. However, if I haven't shelled out $150 or more to see a game in person, and I'm watching it at home on TV, is it really necessary for the broadcaster to deliver all the crowd noise to my home?

I think not. If I happen to attend a game, I can bring ear plugs. If I'm at home attempting to follow the game on TV, I'm finding I can hardly hear the play by play announcers over the crowd's "white noise." It's not very enjoyable. Why can't broadcasters filter out some of the noise?

In a similar vein, is it necessary for TV shows and movies to have the background music no longer in the background? That is, why does the music so often drown out the actors?