Ummmm, how would the majority of people on this site react if someone who has never seen a tank would start explaining how it works and how to use it in battle?
Are they asking good questions? Are they pointing out flaws in the data? There are plenty of examples of people with lots of letters after their names being incapable for one reason or another of critical thought. Bowing before credentialism is a mistake.
Maybe it's an American thing, but I don't have a problem with a plumber asking questions of a PhD. If the PhD is as smart as they are supposed to be, then the facts should speak for themselves. If the answer is "How dare you question me!", then my BS meter starts pegging.
What if the facts speak for themselves, the PhD explains as much, and the plumber doesn't listen?
Take this controversy over Hydroxychloroquine. It's been entered into studies around the world for weeks now to see if it has any meaningful effect in treating this virus. Here in the states it was made more available to docs to use despite the lack of evidence. In short, everything that should have been done in case it turns out this drug is helpful, has been done... yet folks on the Right here in the States are bitching over... what exactly?
Keep in mind we also have a real concern that we have enough of the drug on hand to treat those who have conditions where we know the drug is effective.