More specifically, it's a sociopath behavior. They're not projecting on purpose. They're doing it because they legitimately lack theory of mind. They actually believe everyone feels the same way they do because they can't comprehend otherwise, like a dog who's very sure you want to take their disgusting, dirty bone away from them. They want it, therefore everyone must want it.

Women are often erroneously considered the more empathetic sex, but they're far more likely to have an almost complete lack of empathy, at least initially. That has a tendency to change once they have children. That's why people who write this kind of thing are almost always cool wine aunts. They never had kids and never fell in love, and as such they never developed empathy.