> fwiw, new and better better technologies need to get used for the first time, eventually.

No-one disputed that, I'm just pointing out that it is a very valid point for someone to say "I have concerns that we're rushing out an experimental vaccine". You might take issue with the specific wording (I don't) but the general point I hope we can agree on.

Let's say that I think the point is understandable, and shouldn't be dismissed out of hand if only because nobody likes being treated like that.