I had the same thought, but didn't want to sound insensitive.
Saying "Your fault, using Arch for something important is a bad idea, you should have made a backup before", while he fears all his important data is gone, would have been rude and very unhelpful.
But immutable distros solve these issues, yes. Since I switched to Silverblue I've never been more relaxed than ever. If something goes bad, I just select the old state and everything works, and updates never get applied incompletely like here.