I think it makes the bureaucrats feel better more than the astronauts. IIRC it was in the Gemini program that the astronauts had ejection seats for the Astronauts. They were extremely hesitant to use it because in testing it ejected too fast before the canopy could pop open. If they ever used it then ... insert a colorful metaphor about a bug on a windshield here.I would guess this is more of a moral item than a real answer. Having something to say "we can save you" rather than the reality of saying "You're screwed." should make the Astronauts feel a little better.
The number of known ways to die on this trip is staggering, and there are uncountable unknown ways for it to go wrong. You prepare the best that you can and have to accept that there will be things you can't fix, that no-one can fix, and those things will probably kill you.I wonder what they're going to tell the folks on the first manned mission to Mars.
There are people, myself included, that would volunteer to go to Mars with full knowledge that it's a one-way trip. If we wait until it's perfectly safe then we'll die a one-planet species.