Some researchers and writers published books about this topic: how the psychology influence the taste of the readers.
It's very intuitive that the word choice matters when we want to be persuasive, capture the listener's attention or simply avoid to hurt him. The importance of the presentation is clear to the human kind since thousand of years, but only with the psychological studies we have clearer some influences of a speech which are counterintuitive.
To better clarify the topic: trying to help someone may hurt his self-esteem if he interpret our attempt like a statement of superiority.
Now I was looking at this revision, which I put also here for easyness: https://academia.stackexchange.com/posts/29363/revisions
The last part which was deleted contained an opinion which was slightly critical. Another user deleted it. We may some reasons to agree with his behavior but this is the point. Why do we agree on his revision? Why human being living in different countries developed the same beliefs about focusing the discussion on xxx and rejecting yyy.
Pscychology somehow teached us that beliefs are not absolute as everyone would think of his one. So, if every convention was caused by something. The convention related to the definition of rethoric and dialectic should be deep into the human brain structure.
NLP is not a science, however are there serious books to study about communication seen in a scientific way?
Why are that kind of sentences (the one expressing polemical opinions) rejected by most of people?