I still don't understand how I'm helping society by vaccinating. Almost all scientists out there are saying that the vaccines don't stop the spread. So I won't

I still don't understand how I'm helping society by vaccinating. Almost all scientists out there are saying that the vaccines don't stop the spread. So I won't contribute anything, plus I'm not keen on getting myocarditis while I'm in a shaky health condition due to pre-diabetic condition. So why should I do it? I will not help anybody (and no I won't hog an ICU bed).