Can someone who works at context/safety for social networks explain how these decisions are actually made? Specifically when topics are important like early treatments of COVID

This latest video about the vaccines is strange. This guy wrote a paper because his handyman had a heart soon after getting the vaccine. And because of that he started looking for evidence that the vaccine isn't safe. These are smart people but they don't seem to understand sample sizes and statistics. I don't think there is anything wrong with asking if the vaccine is safe and gathering data to find out. Youtube is doing a disservice is they disagree with me, but they are not making a strong case that the vaccine is a bad thing.