On the first question, because they haven't gone through all the clinical and administrative steps required for approval. Pfizer is submitting the application this month.If they're so safe why hasn't the FDA approved them? EUA is not approval.
VAERS reports for these are off the charts compared to any other vaccine commonly in use. Why is that?
On the second question, my guess from personal and professional experience is that the VAERS are "off the charts" because of fear and anxiety, largely. The booster dose creates a significant immune response (which is desired) in many people, and in truth you feel like crap for a day or two after the second vaccine. You know the VAERS is a self-reporting system, right? I could say I felt lousy the day after the vaccine, report the event, you have an incident.