I don't know they're a domain expert! Hence the 'heuristic' part. I do know that in the course of normal conversation I'm not owed 'links to sources'. I can certainly ask for them if I can't figure out how someone arrives at their conclusions but it doesn't make reading comments without them (or without a list of the commenter's verifiable credentials) 'outright foolish'. What you are describing doesn't sound like a general purpose forum anyone would want to participate in. And the way you're describing it sounds outright scoldish.
Your comments about what internet forums are for is completely unrelated and also incorrect. Internet forums are for whatever someone is willing and allowed to discuss.