That’s a really good point.
I think if the only reason you’re staying alive is to stop other people from being sad, you’ve got a psychological bug WRT valuing yourself for your own sake that you really need to work on, but that is (obviously) a personal value judgment. If that is the only reason, though, you’re right, suicide is bad and cryo is as bad or worse.
I imagine that such a person will have a really shitty life whenever people close to them leave or die; sounds really depressing. I can only hope, for their sake, that such a person dies before their significant other(s).