I think it's more cultural rather than hard-wiring.
My parents practically worshipped doctors, and raised us to do the same. It was very, very difficult on an emotional level to realize that the doctors I had genuinely liked and trusted were wrong about such an important issue; I did look at them as sort of parental figures, so it felt like I had just discovered that that parent was a member of a cult.
Several of my friends are doctors and nurses, and it's kind of the same thing with them, too. They are all caring, intelligent, well-educated people, but it's like they're in a cult and can't see beyond it. When I've shown them research that they've never seen before, mainstream research showing vaccine damage, their eyes glaze over and they say things like, "but there are fewer antigens in today's vaccines" (even though the research is on adjuvants, not antigens) or "but complications from flu are very serious indeed" (even though the flu shot does nothing to minimize those complications, and I've shown them the Cochrane report detailing this).
If you've ever known someone who's been in a cult (I have), my doctor/nurse friends have that same look in their eyes, like they're focusing on...something else; they're looking right at me, but they don't see me. It's more like looking through me.
It's very creepy.
So we've agreed to disagree, and we never talk about vaccines.
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