This is all just loud thinking at this point. But it's something you regularly find new studies too because it seems to be a concern.

Similarly, because vaccines train your own immune system without staying in your body, it’s extremely unlikely for a side-effect to be delayed in time for more than weeks. Note the timeframes on the relevant historical examples:

https://www.cdc.gov/vaccinesafety/concerns/concerns-history....

As to something appearing years later, that seems extremely rare and could happen without getting the vaccine, just being exposed again to the virus. Oh, and neither of us are the people that should be evaluating that because we aren't medical researchers who have closely studied the incidents of vaccines causing reactions years later. I will trust the people who have extensively studied the problem.

The questions to ask are -- how do we define rare? how do we define time to elapse before results show up?

When that rare or time-lapsed event occurs, what is its severity?

Most importantly, what is the severity of the original event (covid infection) to the particular individual?

This risk varies widely between individuals, and parts of it are very much subjective.

For an external entity to make an objective judgement without even considering all the factors is the sign of tyranny.