It's not naive, it's a fact of the business. Even when a show is making less than its weekly nut, it IS still paying the bills. The reason a show closes is because the producers decide that they will not rebound soon enough and they do not want to completely spend the cushion they built up when they were doing well.
You said that it's similar to not paying your mortgage. Try this:
You take a temporary, three-month position that paid what you used to make in a year. Because you know it's only a three-month job, you save the extra money. When the three months is over, you are still able to regularly pay your mortgage because you have those savings.
THAT is the case we're dealing with. The difference is that most shows don't know how long they're going to last, so the producers always save the extra during good weeks just in case. Trust me, a show that is struggling at the box office is still paying all the bills. If it wasn't, it would have closed already.
If you rented a room in your house, and your tenant had lost his job or gotten a cut in pay but was still regularly paying his rent on time, why would you kick him out if no one else wanted to rent the room?
Of course it's cheaper to have a dark theater because you don't have to pay the employees, but when a show is in there, you are MAKING money. Who would rather get nothing when they could get something?
You say I'm naive. But I am telling you, it IS a fact of the business that theater owners very rarely evict a show without another show lined up.
Nothing matters but knowing nothing matters. ~ Wicked
Everything in life is only for now. ~ Avenue Q
There is no future, there is no past. I live this moment as my last. ~ Rent
"He's a tramp, but I love him."