Pulling numbers out of your ass isn't research. Ignoring context isn't research. Throwing your own conclusion a study isn't research. It's fraud.

what is the criteria to be an expert?

Get your peer reviewed research article published in a relevant journal.

wouldn't the knowledge and experience needed to be an expert come from conducting research?

You're confused on this matter

Read up and you'll figure out why the nuances of your post make so little sense to me.

Or are you saying only "experts" in research should count?

Is this a real question? This has to be the dumbest question I've ever been asked and that bar is already really low already thanks to this place.

Yes. Obviously. Would you trust a car mechanic with only experience in medical science? Would you trust a surgeon who's only experience was fixing cars?

*Guess all these downvotes suggest that you don't think this is the case. That we shouldn't require experts and relevant experience when we ask people to do their jobs.

** I love how irrefutable this is. You honestly want to tell me you will not trust someone who knows, who has the experience, the skill set and the knowledge rather than some random off the street? This place is truly degenerate.