I have a conspiracy theory that most users who are an expert don’t post much about that.
For example I am an expert on two things most people find obscure; and for all my comments I just avoid talking about them. It’s too hard to wrap up an idea without lots of background information, there are no short posts or comments I can make about it.
Almost all the highly upvoted stuff are short. Were I to try to make an expert post it would be totally ignored. So why bother for me when I can snarky about things I know nothing about ? More fun !
I think experts who write short terse pithy comments that hit the mark, at a timely fashion, are rarer than hens teeth
It took me years to understand everything I heard or learned about the USA was propaganda, wishful thinking, misdirection, folk lore etc. And even longer to notice nobody understands how it works now.