The vast majority of the earth's people do not fully understand the difference between an established fact, an opinion, and the truth.

They also like to believe that whatever seems likely to them must be the truth.

They know nothing of the scientific method. Because of that, they don't understand that science doesn't claim to deliver absolute, unassailable, and final truth - the only kind they feel happy with.
They don't know the difference between "evidence" (which can be good or bad, reliable or not) and "proof" (which may, ultimately, turn out to be a hasty conclusion.)

They tend to believe that science is just a series of arguments among undependable experts who (like them) will say almost anything to "prove their point."

According to this theory (the one that dominated human history for millennia), the one who batters his opponent into silence through questionable analogies, begging the question, endless repetition, ambiguous definitions, clever diction, pointed barbs, etc., wins. He has "made his case."

Nobody likes uncertainty, and few people have learned to withhold judgment as conditions require.

They think if you disagree with them, you're either naive,foolish, or perverse.

At least, that's been my experience. And not just on these threads.