Crap. Well most of the teams will still make a profit.
- Whoever owns a building...
Even that's not right. Just because the owner owns both the building and the team doesn't mean the team playing in it is necessarily profitable. While the arena may turn a profit hosting concerts, car shows, trade shows, monster trucks, figure skating, whatever, none of those things have anything to do with the team itself.
What if that owner also owned an NBA franchise. Should hockey revenue count towards the NBA salary cap just because they are in the same building? Of course not. The hockey franchise needs to be viable based on hockey related revenue. Not concerts or anything else.