Indeed because no one who isn't a licensed psychiatrist knows anything about neuroscience, drug mechanisms or interactions, coping strategies, physiology or mechanism. Neuroscientists, pharmacists, biochemists, none of these people could possibly have any relevant expertise. Only licensed psychiatrists are worth listening to.

As far as telling someone to stop their prescribed medication, then yes, the prescribing physician is the only one to listen to.

But perhaps you are expert enough and have enough knowledge about his medical history that he should listen to you instead?

I have 0.01 as much of a problem with this proposition as with your previous one. That is an excellent heuristic for most people to use.

You created a "previous proposition" where there wasn't one, by not reading my words in context as a reply the parent post (that described a specific scenario wherein the writer's friends were telling him to stop taking the Adderall that was successfully treating his ADHD symptoms) and instead inventing a completely different context for my words.

In the U.S. at least, Adderall is best prescribed by a psychiatrist, and while there are many general practitioners who will write you a script for Adderall without referring you to a psychiatrist, they're not following what's considered to be best practice. The same doctor would be considered remiss if they didn't refer their patient with heart disease symptoms to a cardiologist. Adderall is a stimulant that can be addictive if used incorrectly, and ADHD is not understood well enough to know that it is best treated by Adderall alone.

While neuroscientists, pharmacists, etc. may be able to tell you details about ADHD or Adderall, they aren't generally licensed to write prescriptions for Adderall in the U.S., and shouldn't be telling you start, stop, or change your Adderall dosage without consulting with your prescribing doctor first.

Laypersons can and should read peer-reviewed medical journals and learn how to make their own, personal interpretations, within reason.

Very true, and also any psychiatrist who makes such statements without knowing specifics should be chastised for violating the standards of their profession.

Does this imply that one should read/use code only of licensed/certified programmers?))

If it was code that significantly impacted your ability ti live your life, absolutely.

The point is that lots of people buying their licences/certificates because they have severe difficulties in proving abilities they claim to have.

Lots of "certified professional" Java/SAP/etc programmers cannot write any code outside an IDE or without context help, leave alone implement simple algorithms like quicksort or basic functions for binary search trees.