I'd have to agree with pretty much everything written both in the editorial and the referenced article. As a freelancer, too often I see team managers refer to the team hero who stays late, knows everything off the top of their head and can usually resolve issues quickly...but never impart their knowledge, improve systems and processes to allow the whole team to perform this role nor do they listen. These people are held in such high regard and yet the way they work is often toxic to the team. Sometimes these people can work differently and do so under a better manager.

Of course, I can't help but chuckle when the so called hero has enough and moves on leaving a vacuum of knowledge and ability behind them. I know I shouldn't but all I hear in my head is "I told you so" being said by the whole team.