MANY things to be bugged about, but this one ...
So they're making this big deal about making the decision to fly into the thing with the last nukes. There would be no decision here. It would be a no-brainer. Even if they had some chance to live back on Earth, they would still do the right thing and try to save lives with their sacrifice.
But they had ZERO chance back on Earth, anyway.
And they're gonna let someone get married so they can now bring someone else into the cave? That would've immediately upped the people trying to cram in there by like 50%. Stupid writing.
And that stupid Neal degrasse Tyson or whatever his name is likes this movie. Uggh. Dude, Carl Sagan you ain't.