I find that it helps to think of professional sports as part of the entertainment industry. In that frame, if someone enjoys watching a baseball game, the teams have done something right. And if I don't happen to be interested in watching bowling or football, that's no more a moral judgment than if someone else doesn't read a book I liked, or is bored by a kind of music. There's enough to go around, and then some.

As with other forms of entertainment, I reserve the right to get annoying at people who don't comprehend "No, I didn't catch that" or "I'm not really into tiddlywinks."