I'm not specifically talking about covid vaccination but rather the general approach of disease avoidance.

But to that point we have very clear evidence that vaccines leave the body quickly and long term effects have been carefully studied and found to not exist for any vaccine ever. Conversely human DNA is littered with the remnants of eons if viral DNA. And as someone suffering the effects of a retrovirus (canker sores) it is well known that they can stick around for a lifetime. Not to mention the scar tissue of severe illness that can take years to heal.