Political pressure is a thing. Just because you can't have a direct effect individually doesn't mean you can't talk about it.

We still talk and try to address climate change even though we can't do much to force China to change.

Also, the facts matter. If they did accidentally release it it they at least should be reprimanded by the world for it.

Movies should be written about it, don't let them forget.

Btw seen Chernobyl on Netflix? It's good.