I’ve never fully replayed a scene, I don’t think. I’ve made revisions or retcons to things after the fact, usually if there was some sort of misunderstanding about something that had been described. We’ll just say “oh, well, you found THIS thing instead of the thing I said,” or whatever. Even in the rare and extreme cases where we all felt like things didn’t go very well during a session, the idea has always been more “okay well, we’ll keep that in mind for next time,” and just move on.
This seems easier and less time-consuming than having everyone actually redo an entire scene or session. I don’t think there’s ever been a misunderstanding or sticking point in my games that couldn’t be retconned in this way. I also think for most people, replaying a scene they’ve already been through isn’t as interesting as continuing to move on to new things, even if the intent is for the scene to play out differently.
When you say, “even the best authors rewrite their work to satisfaction,” I take it you mean sometimes you feel like a scene could just sort of be better, regardless of any major misunderstandings or comfort issues? I feel some sort of regret over my RP choices or in-character dialogue just… every scene I’m in ever, really, so I get that feeling… but even then, that’s another point where I’ll just kind of take the liberty of retconning things in my own head-canon version of the game. Like “ugh it would’ve been so much better if I said THIS instead of that awkward thing I said at the time…” as long as it’s not something that would really change the direction of the scene. Again, I think it’s generally best to just move on to new experiences and not go back to try for a more perfect take. Tabletop games are messy and in the moment in a way that any script, book, whatever that you can freely edit is not.
And it’s already been mentioned above, but I’ll include the obligatory: absolutely edit, retcon, replay, whatever you need to do if it’s a safety or comfort related issue.