You've seen the meme. I've spotted it over and over again. "I play favorites", or something to that effect.
It goes on to list what makes someone the coaches favorite. That they work hard, show up on time, do all the "right stuff", etc.
For example, someone “has” confidence, or they don’t. Another person might “have” motivation, or not. When I coached in Denmark, I noted several swimmers when quitting or contemplating quitting would say they had “lost” their motivation. It was almost as if it were a set of keys they had left under a couch cushion and had given up on finding.
Confrontation is a life necessity. If it wasn’t, I’d guess that most of us would hardly ever do it. Constitutionally, I think human beings are designed to be confrontation averse. That is, we are all more or less “pro-social”. Our extent as a species rely on the fact that we have found ways to cooperate with each other at a very high level.