When I worked in DoD intel in the past, I had to travel to multiple nations with extremely high rates of dangerous tropical disease. I took multiple vaccines for this purpose. At no point do I ever recall worrying about whether the local populations I was dealing with were vaccinated at all. Because that's how vaccines work. They make it so you don't have to worry about others not being vaccinated or giving you the disease. With diseases that are highly dangerous to children, this is a different case, because you can't vaccinate children when they're extremely young and therefore a person not being vaccinated can transmit the virus to them. With COVID it is the absolute opposite. Small children are at minuscule risk and are actually far more at risk from influenza due to the dynamics of the virus. This risk age gradient is actually unprecedented and a unique feature of COVID.
What's really happening here is people who have considered themselves progressive and tolerant their entire lives have decided that they want to impose policies that are tyrannical, but they have to desperately backfill this logic to make it feel okay. They aren't willing to let any form of data disrupt this because if they did, they would have to admit to themselves that they had a tyrannical impulse in the first place.
Notice how when he got the swine flu nasal spray he wasn't demanding that everyone else in every public place he went to also get it. Nothing about this makes sense unless you view it as people trying to psychologically justify tyrannical impulses.