The sad thing is that this point of view is just not accepted to be discussed e.g. in case of (covid) vaccines or other large scale innovations. I'm not a fan of intelligence measuring the potential of a society but just to give an idea of the non-linearities that can be in play here: A reduction of just 3 IQ points on average leads to a 10 fold decrease in people of IQs around 140.
Many vaccines have some of the side effects of infection.
One such side effect (of both vaccine and disease) is minor neurological impairment. ie. you might not be able to remember where you parked your car last tuesday afterwards.
The side effects are typically so minor and/or rare that the risk-benefit analysis strongly favours taking the vaccine over risking getting the infection.
It's a controversial topic because humans are bad at judging small risks, and therefore there are groups of people 'scared' of the side effects of the vaccine and unconvinced by experts saying the risk-benefit is worth it. Some experts believe it is better to say "it is safe" rather than try to explain that there are in fact risks, but they're risks worth taking.
Note: The above isn't covid specific - the same could be said of nearly any disease and vaccine.
