Every time somebody says a soft-science claim and presents it as a fact, I try to vet it with this heuristic: It can't just sound good, or satisfying, but is it actually true? Imagine whether a case can be made for the exact opposite statement, or whether there may be circumstances that the statement is obviously false.
For example, once a principal engineer asserted rather confidently, "At my level, the most important work you can do is usually in Jira." That's a claim that's hard to assess with any objectivity, but I can certainly imagine a different principal engineer feeling the exact opposite, and I can certainly think of many companies where they wouldn't hire/want a principal engineer primarily for Jira work.
Back to this article, any time somebody says "A manager is X" or a "staff is X" I think to myself... well can I think of a company that would want managers who focus almost entirely on not X? The answer is almost always yes.