Either way, it's poor management to interpose oneself between employees. As a manager you should be connecting groups of people to talk to each other directly, not injecting oneself as a go between. If they have issues understanding the material they're much better off asking the OP directly than asking the manager who doesn't understand it either. And they'll be in a much better place to do that if they have read the material OP actually wrote.
I disagree, but stipulate that. Why would this be reasonable behavior when doing knowledge work?
Sufficiently advanced incompetence is indistinguishable from malice.
I'm not seeing the point.
Chasing readability without maintaining accuracy is a failure in the context of documentation no matter the motivations involved.
I'm not saying that readability can't be a consideration when making documentation. I am saying that if you discard accuracy in the process, you've fucked up quite badly.
This anecdote would likely be very different if the AI-modified version had been passed back to engineering for a review before sending it out.