Yes of course there are worse things in the world, but Broadway and coming to New York is a huge expense so you have to feel for these people. For example, last night on the news there was a family that brought their young daughter to NYC because they were finally able to get tickets for Hamilton, and they were in good spirits, but for all we know that could've been her first Broadway show, and it's a lot of money for a missed opportunity.
That said, getting generators doesn't cover one of the major problems during a blackout. If the blackout lasts, there's a public safety issue for tens of thousands of patrons, actors, crew, house staff, etc. when the shows let out. Are they just going to let all those people out into pitch black and leave them to fend for themselves?
"Hey little girls, look at all the men in shiny shirts and no wives!" - Jackie Hoffman, Xanadu, 19 Feb 2008