First Covid-19 shot

why do those that oppose the vaccine believe it doesn't work?
I could care less if it works or not. I don't need it.
My whole family had Covid including me, other than a few sniffles and aches and pains we survived.
We have a working immune systems and don't run to the doctor every time we have a tummy ache.
I don't care who gets the vaccine, just don't push it on me and claim I'm endangering my fellow man by not getting it.
I'm tired of the back and forth bullshit.
Do what's right for you and I'll do what's right for me.
Just stay away from me and you'll be just fine. If you can smell my breath, you're are to close.