My point is that if you insinuate that anyone who holds that position is stupid through sarcasm and snarky comments, you are never going to hear those reasons, because no one will want to engage with you.
I've heard tons of reasons why people aren't getting vaccinated. At least every one I've heard is based on false or poor quality information. I wouldn't go so far as to call those people stupid. But I would say most of their reasons for not getting vaccinated are stupid.