Here's where we disagree. To me, TV market doesn't make for a deserving city for a sports franchise. The fans deserve a team, not a city. LA fans are notoriously apathetic toward their sports teams, especially if they're winning. Look at the Lakers during their heyday. Anyone who was anyone went to their games but now, not so much. Sure there are hardcore fans but they're outnumbered by those who go just to be seen.
Despite Kobe's farewell, the Lakers are in pretty bad shape but are still at 99.7% capacity right now according to ESPN. Their average attendance is better than the Spurs, Celtics, and Rockets, among 16 others including the Suns. (I just threw up typing something positive about the Lakers, btw.)
The Dodgers have always had great attendance since moving to LA. The crowd can be late arriving, but getting to and from Dodger Stadium is legendarily difficult, and is often during weekday rush hour. The Kings have great attendance now, but they're also in their most successful era. Historically they've been average at best, but they're also never going to be more popular than basketball/baseball/football. Both UCLA and USC tend to average in the 70,000s for their home games as well.
I guess I'm just saying that the ambivalence of Southern California fans is a popular opinion but not always an accurate one. In my years living on the east coast, I also went to a whole lot of quiet Yankees and Mets games. But I also tended to notice it because I'd always been told how much "better," or more "die-hard" fans were back east.