Positivity does not mean being a pushover.
Having high expectations does not require (or excuse you) from being a raging dick.
These two concepts get conflated time and time again.
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.