Why is it that every time there is a conversation about a relationship with an age difference, it is automatically assumed that the man is evil?

Why is it that every time there is a conversation about a relationship with an age difference, it is automatically assumed that the man is evil?
I understand that there is a category of men who try to dominate more vulnerable women (Passport Bros, etc.).

But this is not always the case, because for example, an older man may not be the most experienced romantically and then a younger woman who has more experience will have power over him.