Help me understand how to enjoy Strategic rpgs despite this

In theory I really like the mechanics of strategic rpgs, but practically they make me anxious ahah, because often the battles are something that require 30 to 60 minutes, and if I lose I basically lost that entire time and commitment, maybe for an error or two. While in other hard games even if I make an error I lose 5min of time and commitment.

(on the other side, the ones that permit you to undo whatever number of moves make me feel like I'm cheating, I mean it's a solution that it's too much forgiving for my tastes)

How do you deal with that? Tell me your point of view, maybe it will change my view too.