Earlier quoted context omitted.
"how you recognize when you are being patronizing" That's a good point. I'm fairly adept at recognizing when someone is trying to negotiate with me based on some kind of taught methodology. Because most of what's taught is counter to how you would do it naturally...thus it stands out. Once you recognize it, the natural reaction is to feel like you're being manipulated with some technique.
I think part of it is that the observation needs to be genuinely objective rather than veiled evaluation. For example, when I did tech support I would occasionally get chat messages from my supervisor along the lines of: "Hey, I see that you closed out Ticket #XYZ without any resolution or response sent to the requester." (waits for response) (waits for response) (waits for response) ...and it would make me furious,…
Personally, if I'm on the receiving end of that, I'd rather the boss say, "please update this ticket with X and Y" rather than making an "observation." It can't be condescending nor manipulative since that person is plainly exercising their authority. And you can generally resolve problems with an instruction by pointing out that it won't work, or it conflicts with others, etc., which avoids it getting personal.
(This may be why I rarely had these issues in the military, and noticed that many veterans report a great deal of confusion when they get into civilian life because "nobody knows their lane.")