> Hi, I work in academia and disagree with the author’s take.

There is a logical fallacy, and I don't recall its name, but it refers to rejecting an argument only because it does not confirm one's personal experience

> a few minutes of browsing scitwitter to debunk the idea that scientists don’t talk about their field online (even unprofessionally)

Perhaps these scientists' work is uncontroversial, or they are protected, or you are right and Scott is wrong. Spend some time with Slate Star Codex and the new blog, and you might become aware of counter examples which you would not become aware of by browsing Twitter