You have to compare the risks to the risks of the disease and the likelyhood of contracting that disease. And for COVID-19 the risks are very high. It doesn't make much sense to me to trade the very high known risks of COVID-19 against the relatively low risk of rare side effects in a vaccine. These vaccines have been tested in ~40,000 people each, so we do know quite a bit about their safety.
The fatality rate of COVID-19 and the rate of serious complications is high enough that it easily dwarfs the chance of any potential rare side effects of the vaccines.
The fatality rate of COVID-19 and the rate of serious complications is high enough that it easily dwarfs the chance of any potential rare side effects of the vaccines.