Ummm you've misunderstood what I was saying. I was agreeing with you and saying the same thing.
The 15 minute rule is needed for Pfizer because of the risk of anaphylaxis. That won't occur psychosomatically, I said that too. I know I said probably but that's a turn of phrase. However the risk of anaphylaxis for Pfizer is real hence the 15 minutes.
The others yes I completely agree there will be people who feel headaches or nauseous etc because the idea is put in their head and they're overthinking it. Which is why I said that you certainly might get the others psychosomatically. It's a shame you can't avoid the 15 minutes due to the anaphylaxis risk, but then that does leave people overthinking everything else.
I don't see why you're objecting to me agreeing with you. I think you misunderstood that and took it the wrong way.