I've noticed that when people reduce some random thesis to a level of brevity beyond the minimum to actually express it coherently -- but do so succinctly and perhaps a bit archly -- the audience enjoys the illusion of effective communication, and fills in the intellectual voids on their own, affirmatively.
As if they've gotten a bargain, or been saved some time.
I mainly noticed this when so many people stopped writing awesome long-form blog posts, and supplanted it with tweeting. I seldom found value in the tweets, even from people whose blogs I prized. But many people did! And the tweeters were encouraged.
I see the same thing here. I mainly know the OP from his essays, which are overall quite good (IMHO). I subscribed to the RSS feed of them. I think I've read them all, even.
But it's hard to imagine a version of this tweet as a full essay (even a short one) that didn't end up repudiating the core idea entirely.
Because once you had to add even a bit more detail -- such as examples of it happening in the wild -- you'd end up realizing that people don't generally get mocked for changing their minds. That changing your mind is actually encouraged and praised by various books, corporate 'leadership principles', philosophers, etc... and in most cases, derision and animosity aimed at opinion-changers tends to be aimed at the ones who are obviously self-serving hypocrites, not those who've genuinely reconsidered things and come to a better conclusion.
So even though you still could, no dooubt, come up with some examples, through the process of writing the essay (or blog post), you'd... realize it was bullshit.
And then, you wouldn't publish the essay.