Social poll.

It should be acknowledged that this doesn't waste the opponent's time. If we talk about saving real time, then the game itself consumes your life time.

Which can be saved with a replayable quick battle.

And if we talk about saving game time, then this is a great injustice to the opponent.

Who can set up a replayable quick battle and save not only their own time but also mine.

Secondly, in some battles, even with a bug-free quick battle, the AI wins against all logic.

This means that the quick battle is not bug-free and needs to be improved.
Or that you have problems with logic and this battle can be won.

Furthermore, a replayable battle allows you to roughly assess your strength against a particular army, thus we get extra game information earlier than the opponent, moreover, the opponent has such an opportunity only in a manual battle and, possibly, with significant losses.

What does this mean? What is the informational advantage?
I attack with five angels against a squad of 1-10,000 troglodytes using a quick battle.
I am told "you lost five angels, do you want to replay"?

What information did I receive that gives me an advantage over the opponent?
About the size of the army? I get this information in the very first second of the battle manually.
What is the advantage?