If anything, it would be even more so. If a person on the moon had a medical emergency, this would be a serious problem but there's another person there to hel

If anything, it would be even more so. If a person on the moon had a medical emergency, this would be a serious problem but there's another person there to help and/or fly the lander back to the capsule. If the person in the capsule had a medical emergency, it's hard to see how any of the crew survive. More likely though, as you suggest, the same astronomical standards (pun intended) applied to all crew members.