Scientists are not in the business of making recommendations to lay people. There are other professions for that: doctors, lawyers, bankers, teachers, journalists etc. Scientists are mostly in the business of disproving the conjectures of other scientists.*
* actually grant-writing, but I’m not sure that counts either
Also, I’m pretty sure that the inclusion of “deferring to experts” in the accepted rules of formal logic would be a minority opinion among philosophy professors specializing in that area. “The fallacy guy” may not appreciate the irony there. It’s still a fallacy because it’s not logical in the strict sense of an argument (deduction from premise), regardless of whether it’s a good idea or not. It would only hold if the premise was that the “expert” source was an honest oracle, so without acceptance of that premise by both parties, the argument is erroneous.
