And I keep telling you consistently that while you can view your comment as a positive, the recipient may not and there is little you can do to guarantee that. That is the whole point of you cant control how other people feel about things. As nice or kind or positive you think you are being, the other person may take it poorly. It does not matter if you thoguht you were being overly nice, a person may take it poorly. So rather than sit there and try and guess how another might take something, just be polite but frank and friendly. If htey take it poorly, then thats that. You tried and it didnt work out. Maybe someone else learned something though so silver linings. If they take it well, then all the better for everyone.
This goes back to what I just said above - what is rude and what isnt is up to the receiving end. You cant control what others view as rude. You may personally think somethign is rude, but that doesnt mean that others do, or that you doing something that you think isnt rude wont be seen as rude by other people.
You keep being inconsistent with what terminology your using, how you define things, what counts as rude and not rude, etc. You havent nulled any argument, youve been trying to find loop holes in the basis of the sticking points. It is not nullifying my point that you first said you interject into a discussion where you framed it as you were just a passerby, then it became "Oh well, you are a part of this conversation" at which point I addressed this new example, with both possible interpretations you could go with.
The crux of your argument has shifted from "Its 'calling people out' to offer 'unsolicited' advice or critique them," and when this was broken down you changed tact, where criticism is bad. When pointing out advice, criticism and critique, it changed again. Then it was "Well critique and criticism are different," then tried to find an explanation on how critique is fine as long as it's positive but then not fine if its negative. Yet the core thing I keep telling you, no matter how you keep changing things up and claiming "Semantics," is that you cannot control what other people think, and it is better served to address problems as you see them for everyone involved in a team environment, albeit in a polite and friendly manner. Where as youre arguing its fine in some cases, but not in others, and you determine if its positive or negative, but another person might see what you say even if well meaning as rude or embarrassing, so its better to just not say anything in front of other people and whisper them privately so you can spare them embarrassment, but then you still can embarrass them implicitly by even messaging them cause it lets them know you knew something was up.
Heck, you willingly admit that 'addressing something' in the immediate is important to do at times, courtesy and rudeness be damned. So it's not even an issue of 'you should never do it or dont do it generally,' but now determine where the line is regarding what to address and what not to. So who cares about rudeness if it means solving an immediate problem.
So....You again tacitly acknowledge that while you may not be trying to convey something in a certain manner, someone else might take it that way? It's almost like you cant control how other people take things!