I am also against letting a bot enter merges of any kind, unless those edits get placed into a special queue that NEEDS votes / edit notes to pass, unlike regular edits that pass even if no one votes on them after a week.
Last year, another editor was using AI tools to enter a lot of edits, and there were just not enough people looking over those edits, I voted on a lot of them, but I literally couldn’t keep up with the vast amount of edits that needed to be reviewed. Some of those edits were actually wrong (they have been fixed by now) and either no one voted on them, or I made the mistake of voting incorrectly on some of them, because I wasn’t thorough enough checking the details. (to be clear, that editor learned from those mistakes and they make good edits now!)
MB has had the problem of not enough people voting on edits for a very, very long time, see Idea: Editor experience points and CMV: all edits should require votes, also the ever-growing Requests for Votes Thread (10 year old thread!)
You can also look at a graph like this one - Editors who submitted edits in the last week vs. Editors who voted in the last week to really get a good idea of the situation.
A bot that enters thousands of destructive edits will inevitably make mistakes, and there may not be enough people looking to catch those mistakes.