That is why I question my own bias. One possible explanation is that I am AI positive. So when people test out "What do you think about AI?" my own responses are generally positive. That probably filters out people who don't want to argue or contradict.

This kind of effect would work both ways. People who are non-confrontational in general will choose to keep quiet if their opinions differ. In this view, both pro-AI and anti-AI sides might find themselves having their bias confirmed due to opposing views self-silencing to avoid conflict.