It is highly unlikely for a person to be worse off by taking a vaccine for a prevalent disease. Like 1 in a million odds.
Besides,you have absolutely know way of knowing what you assert. And I'd go a step further and say it's absurd to claim that injecting anything in your body is neutral or strictly positive. There are absolutely tradeoffs to medicine.
Neither of these even account for the fact that a 1 in a million chance of adverse vaccine effects might dwarf the chance of long term harm from covid in a healthy person.
So, again, on a personal level these things look different.