For off planet research: because ( https://xkcd.com/695/ aside ) we don't care if the robots "die". Human space exploration has an enormous amount of overhead to keeping the humans alive at all; even the sensors humans bring with them are compromised by having to be operable in a spacesuit.
Not saying that there isn't value to sending humans into space - it's just that that value isn't in gathering data for science, other than on the astronaut-subjects themselves.
Not saying that there isn't value to sending humans into space - it's just that that value isn't in gathering data for science, other than on the astronaut-subjects themselves.