It’s because 99.9% of the time when someone says “I just want you to know about the side effects” they
Have learned it from YouTube or the internet and do not possess a medical degree
Do not fully understand what is reported as a side effect, or that most reporting databases are treated as "Could it even remotely be possibly attributed to a vaccine, if so then post it here and let the experts figure out"
Will not admit that experts are in fact, experts, and that they should be relied on more than random internet people
Will continue to argue on any point for eternity, never listening to any counter points
We have heard it, we understand it already, we are informed. The risks are minute and rare, vaccines are some of those things that we each take a tiny risk so that society as a whole can survive and continue without these horrible diseases. If you are unwilling to take a vaccine that has a <0.01% chance of giving you a minor side effect because you are so selfish that you can’t see what herd immunity is, then that says more about you than any side effects would.