How come some people cannot separate the story, comment, idea, etc. from the person?How come some people cannot separate the story, comment, idea, etc. from the person?

At times everyone seems to do it, I try hard to break myself of it, but I do as well, someone makes a statement, or writes a story or has some thought and it gets seen as what they believe or support. It doesn’t happen with anyone 100% of the time, but way to often; if a woman wrote a screenplay about a drugged out hooker some would see it as just a work of fiction on a subject she chose, others would think she supported rampant drug use and selling your body for the money to get it; or that it was auto-biographical in the fact it was about her life and not some fictional character. Situations such as that happen all the time in various ways. Just because someone writes about something, makes a statement or ask a question of such, doesn’t mean they are in agreement or promote it, so why do people make the erroneous mistake in thinking they do?