Can’t say I have ever seen it play out any different, so I would assume that “quite often” to be exceptionally rare.

People can tell if they have seen it lots of times before they start to shut it down.

I would also argue that it makes them smart, not pro stupidity or anti intellectual. Let me try and use a tech analogy to explain it. Say you repeatedly see junior admins putting unsecured databases on the internet which subsequently get compromised. How many times do you need to see the beginnings of that event chain before you start intervening?

Also there is nothing intellectual about entertaining the same argument over and over. Or do you also think we should seriously consider the flat earth argument every time someone brings it up.