People can die, Arietta. Just because they come back doesn't make it mean any less.

[He says that in a harsher tone than he intended. That's particularly because of how Sokka himself had died earlier this very year.

And because he himself knows what it's like - he was even temporarily dead at home, and even though Katara was able to restore him, he knows that there were a few moments there where she had experienced what it was like for him to be dead.]

I can't say which is better or which is worse. But I do know, and I believe... that even when a person doesn't come back, death isn't really the end.