“It's a well known phenomenon at this point that social media exacerbates scepticism and pessimism. Which makes sense - busy people with a lot going on spend less time online than loners and depressed people.”

That does such a great job of expressing something I’ve intuitively “known” for a long time.

There are the people who do all the talking, and those who are doing - very few who are in both camps. If you’re busy making things happen, you’re less likely to be commenting.