I think they were saying they would sign up just for the experience, even if it's unnecessary to the program.

But that was exactly the point I was responding to, no? If NASA was fine with skipping the astronauts, then they would just send it unmanned, not find a random volunteer.

especially not one that may chicken out ( "very not brave" ) and destroy the cabin from the inside out by any means necessary (bashing at walls, pissing in cracks, etc.)