[david-gpu]

You forming a personal opinion after years of interest in the subject is fine. You asserting that opinion as a fact is the problem.

It is a tale as old as time. See the story behind the term. ultracrepidarian: https://en.wiktionary.org/wiki/ultracrepidarian#English

[MarkusQ]

Versus https://en.wikipedia.org/wiki/Argument_from_authority

See also: https://www.science.org/content/article/potential-fabricatio...

Amateur's asserting their opinions as facts isn't great, but epistemologically it's no worse (and systemically, like less harmful) than when the experts do it.

[david-gpu]

Experts, when given the chance, have a tendency to speak with nuance and describe the degree of confidence they have in different statements.

Compare this with an amateur writing with certainty about a subject that subject matter experts continue to debate after decades of work.

I know which one of the two I would rather bother listening to.