The OP uses the word "insane", not outlier. It's clickbaity, and used in jest, but I think it better captures a subtlety of this phenomenon: The prolific commenters are molding every discussion in their image. They might have an interesting angle on the story, or they might just be saying trivial things with beautiful prose. In any case, there is a lack of diversity in general -- discussions are driven by the worldview of a few.
That would be an argument for lurkers to make an effort, even if, like this comment, it's just a barely-formed idea.
Edit: "molding the discussion" -> "molding every discussion"
In other words, we only hear and watch stories from those people who chose storytelling as their career, and if you assume we are inevitably influenced by their views then we're effectively taking advice from them. This means entertainment shapes the viewer-listener's interpretation of reality to better fit the model of reality to which storytellers subscribe, but I'm pretty sure that's not a desirable outcome in the long run.
In a recent interview, Michelle Obama said we only ever tell young people about the good parts of marriage. We hardly ever explain to them that it has its ups and downs, that it isn't "broken" if suddenly the lust isn't there like it was in the beginning. She presented the argument in a much more cogent manner, but in any case, if you believe her to be right, then this seems like a specific (important!) example of this broader trend.
There are countless others out there who go on to live perfectly happy lives with perhaps much more useful advice to us, and who would arguably be a better influence overall – you just don't hear about them.
This thought often crosses my mind in particular when I consume media that is more 'psychological' in nature. Much of the time I can't shake the feeling that no matter how convincing the characters and their 'inner life' is presented, we're still ultimately seeing a projection of the writer themselves.
Sometimes I notice how certain characters seem richer than others, and usually these characters are obviously closer to the writer's own life. Perhaps this is why slice-of-life shows seem to do well (Atlanta, Better Things, Louie), because they're just the writers writing about themselves.
Or when I read a Dostoevski novel, I can't help but wonder how much of these character's inner lives are really just thinly-veiled versions of Dostoevski's (and, considering my love for his novels, probably my thoughts are 'compatible' with his).
What makes all this worse or more complicated though is that especially for television as a media, there are all sorts of pretty serious constraints. A show needs cliffhangers, ideally every episode, and at least every season, and unless you're on Netflix, you need mini-cliffhangers before every ad block. I imagine that's got to have some significant effect on the story.
I rather like this article by David Foster Wallace that sort-of goes into all of this: https://jsomers.net/DFW_TV.pdf (E Unibus Pluram: Television and U.S. Fiction).