ALL medicine should be questioned, heavily today. We have dangerous meds put on the market all the time.
Sure but...
Anyone remember Vioxx? ... phen-fen ... Ozempic
None of which are vaccines. The poll was asking about"the science on vaccines" which is very well established, and those questioning it do so out of either ignorance or a "hidden" agenda (usually to sell a hand wavey book or get subscriptions to their "healthy mom something or other" YouTube channel).
The people with the actual credentials to be qualified to question vaccine science aren't questioning it, because there's nothing there to question.