Nobody will defend your time if you don't do it yourself. Company's will take-take-take from your time not because they're malicious but just because they need to get stuff done and the monolith of a corporation doesn't pick up on nuance and feelings at a micro scale. I've seen this play out time and again, particularly with people who always want to be responsive or helpful. They burn themselves out.
Fwiw the teammates whom I consider to be the most indispensable are not the ones who know the most details. They're the ones who are the most adaptable and able to take on more responsibility and lead with creativity and urgency. This typically means that they're good at defending their time – they often have the indispensable knowledge that the author writes about, but only pull it out when they really need it, because they know that their real value add is in scaling themselves and their teams.
(Also fwiw, I've had a very similar career trajectory to the author based on the article's first paragraph so I feel like I understand the signals that they're writing about)
Fwiw the teammates whom I consider to be the most indispensable are not the ones who know the most details. They're the ones who are the most adaptable and able to take on more responsibility and lead with creativity and urgency. This typically means that they're good at defending their time – they often have the indispensable knowledge that the author writes about, but only pull it out when they really need it, because they know that their real value add is in scaling themselves and their teams.
(Also fwiw, I've had a very similar career trajectory to the author based on the article's first paragraph so I feel like I understand the signals that they're writing about)