In what sense?

The only thing it can really do is inform me what sort of bizarre misinformation they have bought into. Unlikely ever to repair the drop in my opinion.

I think you may find out that the "bizarre misinformation" is a bit more nuanced than you think, and the issue is not about facts at all.

I spent some time talking to antivaxxers; I've shared my impressions in a parallel subthread:

https://news.ycombinator.com/item?id=10878136

I understand all that, that's not enlightening. I am well aware of the emotional motivations behind the position.

They dropped in my estimation because they allowed this emotional reaction to endanger their children.