They may go bankrupt, but someone else will buy the assets, and as long as people will want to go to cinemas to watch movies (demand), there will be movies (supply) and cinemas will reopen, albeit with new owners.

It's Economy 101.

And Economy 101 is very simplified. The supply-demand aren't completely linear and there are things like barriers to entries (as the person below mentions) and opportunity costs for other companies to swoop in and buy the big chains, and at the moment both are very high. Even if demand is high,

Plus, NATO's focus here is smaller cinemas, which regardless of what happens will fuck over the people who work here.

and only started to make safety guidelines in August when it's too late and public confidence in going to movie theaters was already destroyed

Public confidence in cinemas was very low months earlier. The only way public confidence could've increased is if cases were minimal.