It's not wrong though, isn't it? Amount of confidence allowing someone not to avoid confrontation essentially makes some people feel unsafe, perceive it as unpleasant and causes hate response.
This assumes the only way to persuade someone to change their minds is via unpleasant confrontation. In my experience this is very rarely needed. You're right that a lot of confidence is required though, but it is the type that is rooted in truth and humility (rather than confidence from convincing yourself how great you are).
The very act of trying to convince someone is an act of manipulation, you can't divorce the two. Unless you're speaking simply to say your mind and without the desire to actually change something? Is that an act of integrity? Or is proclaiming what you believe for no other effect than to let people hear you an act of pride?
Indeed. I'd say this is almost always the case. People apply Cunningham's Law without realizing it. That manager you hear confidently stating their project idea? There's a good chance they aren't really sure about it, but assume someone will push back if it's wrong. The same applies to behaviour; speaking back is often what it takes for the other person to back down from unethical behaviour.
Arguably, not considering strategic approaches in maintaining social ties and fostering greater community is also abandoning one's integrity as a social animal.
I would argue that most people do see it exactly that way. Even if a confrontation is handled extremely well, from the little data I have (what I've seen) most people are so terrified of confrontation at all that it is almost always seen as rude or disruptive.
Well, of course it's disruptive. That's the point. You are trying to force a change in someone's behavior. But it doesn't have to be adversarial. You can have disagreements but still try to work together. In fact, I would say it is extremely important to try to do that in almost every circumstance. Even if you are confronting someone who is not an ally, it's best to try to do it in a way which is strong and firm but also doesn't make them into more of an enemy any more than necessary.