I'm certainly a part of that group. For instance I ended up doing extensive research on e.g. MMR before deciding to vaccinate my kids for it. If this were a decade ago, I almost certainly would have done it without a second thought, just as I took all recommended vaccines before traveling without a second thought. So I'm obviously not anti-vaccine in the least, but I no longer trust public messaging on the topic.
It was just another (of the increasingly endless) examples of governments/companies pursuing short-term interests while ignoring long-term consequences. When it comes to what people put in their bodies, trust is more important than literally anything else.
[1] - https://xcancel.com/ITGuy1959/status/1581034815700488192