I think you're wrong to assume that it only works with people who are "too ignorant or low intelligent". Confirmation bias is not limited to dumb people. It's a

I think you're wrong to assume that it only works with people who are "too ignorant or low intelligent". Confirmation bias is not limited to dumb people. It's always more pleasant and comforting to listen to people agreeing with you (even if what they're saying isn't super insightful) rather than people arguing against your values (even if what they're saying is very interesting). Searching for contradictory viewpoints and actually managing to listen to the argument with an open mind takes effort. That's the big problem with most social media currently, they amplify this bias to the extreme. You can hold a fringe belief like "earth is flat" and still manage to find thousand of people agreeing with you, spending hours every day consuming flat earth content and avoiding any dissenting voice.