Social poll.

Where is the logic? All these tasks, without a replayable quick battle, can easily be solved by manually conducting the battle, with the corresponding time costs.

It seems you didn't read what you quoted.
I'm not saying that you personally do that. That's the first point. Secondly, as a mod tester and someone who has used quick battles online, I can say that they will be used to avoid making mistakes, and sometimes, to cheat. A buggy quick battle in some cases allowed for battles against ranged units without significant losses. To be honest, I once used cyclops to break through a Garrison of the Undead on Jebus, with an army of 3 angels, 3 hydras, 26 archers, and a few snakes. I only lost one hydra and a snake. Could you repeat that?
A non-buggy quick battle would simply fail, and by replaying such a battle, we agree that the losses will be catastrophic because there is no real army to break through 80 strong ranged units.

Now, regarding the non-buggy quick battle in general: in addition to saving time, there are certain advantages that are achieved unilaterally. Often, these advantages lie in the fact that the computer knows something that the player does not know when conducting a quick battle. If anyone is interested in the analysis of AI vs AI battles, they will be convinced that the bugginess in this game still needs to be fixed. If players used quick battles in good faith to save time, then everything would be fine. But players of Bay's level, I think, will not find it difficult to either play a game in World Tournament or play on the latest mod. And it is usually these players who reach the playoffs of major tournaments, and they (apart from the language barrier) will not have such problems. For example, the SoD quick battle does not know about the existence of the tactical phase.

Added 1 minute ago
Medium, fast army transfer? Are you kidding?))