People always assume. If no one assumed we couldn't make educated guesses. Like if someone likes us or not. I got good at it. Being observant. But only because I know the bad of it. It's taken a lot of seeing people get hurt and even dying to know what makes people tick and how to avoid getting into dark places.
Assuming is one thing. Thinking you can't be proven wrong as if you're "in the right" in quite another. The thing about assumptions is that it isn't necessarily true. People will do as they do and feel as they feel. Trying to control them without consent never ends well in my experience. Even telling someone to calm down or not be angry can have negative reputations while letting them be human can be the very thing that does that.
It's amazing how many people fail to understand that.