Right, but then you get into the whole supply vs. demand thing. As long as people are willing to pay the current ticket prices, they'll stay where they are or go even higher.
There's enough money being made that the owners are reaping the benefits as well but in the end, it comes down to the players. For the most part, attendance (and thus revenues) from stadium to stadium is tied to the team's performance. Except with owners like Carl Pohlad, who was vilified for not investing money back into a team that was successful and popular.