That’s pretty rare in online discussion, especially the kind with voting. The most popular argument wins, not the most correct one.
I could explain, as you suggest, and so could other experts. In my experience the likelihood of a response with denials, shifting goalposts or similar is much higher than an acknowledgement and gratitude for education. I’ll pass, but others might enjoy the challenge.
I've commented on some of the RH posts and got downvoted because people didn't like the facts (and I think maybe took it personally too). I've worked in Finance long enough professionally to know that I don't understand this fully and few people do. I do know enough to know when the comments are nonsense though.
I think that some of these issues comes down to respect and also arrogance. Imagine going into a new field and after 30 seconds deciding that you know everything (the Dunning–Kruger effect?)! Have a little bit of respect for those in the field and listen. Feel free to comment/ask, but don't spout 'facts' without checking and I think we'd all move forward faster.
The other reason that listening and not spouting fiction is a good idea is that it is a lot of effort correcting people d that effort could otherwise be spent elsewhere. Folk have good will, but there's a finite amount that shouldn't be wasted! Once that's run out they look to use their time effectively. Correcting you /again/ won't be up high on the list.
Or you could simply point out when someone is wrong, and explain why, assuming you are an expert. Then we all learn.