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It sounds uncheritable, but i think people are mostly to blame. And while you say suggestible i say stupid. My opinion is that each person has, at a minimum, the responsibility to use their brain and putting the onus completely on the technology/the system feels a little like saying guns kill people.

believe what harmonizes with their brain waves

Exactly. Confirmation bias can be a deadly disease.

ironically, such algorithms are made and tuned by physics phds in many cases.

Interesting. I wonder what it might be doing to humanity that children and teens often can have "answers" to questions before they can even pose them to their parents. Talking to parents, they might be wrong, but at least there is tge built in feature that eventually you see their foibles and realize maybe they haven't actuslly gotten it all worked out.