Someone without legs might be more nimble in zero-G. (Hell, there's probably even a significant weight savings.)
There are an infinite number of what-if scenarios that can be cherry-picked to form an argument.
Realistically? Yeah, I think they'd die. Even if the Mars base had a trauma surgeon, which is a big 'if', would they really be equipped to handle something that severe? Would there even be enough medical staff to support a surgery that involved? If so, that's must be a very developed Mars base. If the Mars base has facilities more comparable to the ISS than an aircraft carrier, I think anybody in that situation would die.
Oscar Pistorius qualified for the 2012 Summer Olympics without any.
Anyway, the entire ISS is built around astronauts using their feet as anchors, allowing them to use their hands for work. Without legs, you wouldn't be able to do maintain your position while working in 0g, hence the challenges of spacewalking. There's plenty of videos where astros show how the top of their feet become calloused as they use them to lock in their bodies to the structure.
I fully expect an organization capable of creating the ISS to be capable of figuring out a way for prosthetics to be usable onboard. Put a bit of velcro on one of these, perhaps: https://www.youtube.com/watch?v=a2z8CE2vomY
This about a government choosing to spend many millions of dollars over 10 years to train this one person to do an insanely difficult job. So you can bet that any disability of any kind is going to be intolerable. They will pick people with 0 physical, mental, behavioural or cognitive disability. Bum kidneys? Out. Don’t react well to a fire or spiders or smoke? Out. Can’t solve the orbits question in less than 63 seconds? Out. Argumentative and not the best team player? Out. Sadly, this will also apply to any sort of physical limitation as well. It would be trivial to add some Velcro here and there, yes, but making the entire astronaut training circuit itself accessible, from everything like the 0g sim harnesses, which expect the weight of legs, to flight training, to the Russian centers, is sadly not gonna happen.
we’re hardly experts at space travel (google says only 533 people have been to orbit). given that number, any disability is significant for the job of going to space at this point, especially when every action can potentially bring immediate death to everyone around you.
Also, saying that an action is taken "in the principle of diversity and inclusiveness" does not imply that the decision was solely based on that, so that quote is meaningless to your argument.
To get out of a gravity well, being light is good.
Maybe not a hard requirement, but they are very useful. Scott Kelly talks about the hard callouses he had on his feet because you end up using your feet to navigate and hook yourself into place a lot.
https://www.businessinsider.com/scott-kelly-weirdest-thing-y...
They should be given a chance to prove the ability, rather than being dismissed out of hand.
I found the movie Gattaca to be a surprisingly good argument for this position despite being fiction and entertainment first and foremost.
You got me curious so I looked it up. NASA requires that astronauts be at least 62 inches (5'2", aka 1.57 meters.) So they already permit astronauts to be substantially shorter than average. They wouldn't take people with dwarfism I guess, or people without legs.
If I had to guess, these requirements exist because they need people who are compatible with existing equipment. For instance, astronauts on the ISS do not get personalized EVA suits; they pick one that fits from those which are already up there. Perhaps somebody without legs could fit in a suit with legs just fine (stuff the legs with some towels maybe, if the legs flopping around is a problem?) But for somebody with dwarfism or a related disorder, I can see this being a legitimate problem.
Incidentally, NASA also discriminates against the tall. For the Mercury program they wouldn't take anybody over 71 inches (5'11") and today they won't take anybody over 75 inches (6'3"). This doubtlessly is due to equipment that isn't sized for taller people.
(And I completely agree with your comment)
There are disabilities that would create real difficulties.
ESA identified a few that they seem to think won't create problems and made a really small tweak to their standards.