Why do the Space Shuttle astronauts hate freedom?

Commander Eileen Collins said astronauts on shuttle Discovery had seen widespread environmental destruction on Earth and warned on Thursday that greater care was needed to protect natural resources.
[...]
“The atmosphere almost looks like an eggshell on an egg, it’s so very thin,” she said. “We know that we don’t have much air, we need to protect what we have.”

Spaceballs (1987):

Colonel Sandurz: There it is: Planet Druidia.

President Skroob: Ah, Planet Druidia, and ten thousand years of fresh air.

Dark Helmet: (to Sandurz) The way he runs things, it’ll only last a hundred.

President Skroob: What?

Dark Helmet: shrugs.

Colonel Sandurz: We’re beginning metamorphosis, sir.

President Skroob: Good. Get on with it.

Dark Helmet: Ready, Kafka?

Colonel Sandurz: Metamorphoses is completed, sir. Spaceball 1 has now become…Mega Maid.

Dark Helmet: Good.

President Skroob: Remarkable.

Dark Helmet: Now, commence Operation: Vacu-suck.

President Skroob: As president of Planet Spaceball, I can assure both you and your viewers that there’s absolutely no air shortage whatsoever. Yes, of course. I’ve heard the same rumor myself. Yes, thanks for calling and not reversing the charges. Bye-bye.
[hangs up]
President Skroob: Shithead.

We already drink water from bottles, how long ’til we’re all breathing air out of a can?