To establish causal linkage requires much more intensive research. VAERS acts as potential alarm system, where reviewers can look for statistically anomalous problems among the vaccinated. If such an anomaly does arise, then further investigation is required to see if there is a causal link to the vaccine they took, or if there is some completely different cause. But no one can just blindly look at the VAERS database and come to the kinds of conclusions this poster is doing. He is basically assuming that all these effects are because of the vaccine, but this database isn't reporting that at all.

As a simple example of how this works, there were some anomalous results for the AstraZeneca vaccine among younger people which pointed to a potential risk for blood clots. The EU temporarily halted the administration of AZ until they had done further research and rated the potential risks associated with it. Ultimately it was decided that the risks were low enough compared to the risks from covid that they resumed usage. But they couldn't just determine this from the VAERS database, otherwise they could have just immediately made a decision one way or the other.