It isn't just the managers doing this. Anyone who isn't in a position of authority but has knowledge of the state-of-the-art, research on it, etc. can tell when someone in that position is pushing their ideals over actually having done research or doing logic beyond a bunch of unquantifiable 'what if' arguments. It takes 5 minutes of online research to dismantle their arguments. But it still happens regardless, even in CS and SD where myths are pushed as absolute truths.
"My team always give 110%" is better than "I treat my people like adults with lives of their own", even if it gets much poorer results.
My favorite myth is the one that I hear surprisingly often, from educated and intelligent people. I hear it, because I ask them why they bias for only young people; even in senior management, architectural, and mentoring roles.
They explain that young folks can do the impossible, because they haven't been told that it's impossible. It's a really compelling myth, reinforced by founders of successful unicorns, sharing it as their "secret sauce," as opposed to obsessive work, intelligence, and an enormous dollop of good luck and timing.
I call it the "Don't Look Down" Fallacy.
When Wile E. Coyote runs off the edge of a cliff, he stays up, until he looks down.
If you don't allow anyone into the team that yells "Look down!", then you can fly.
Absolutely. I didn't mention people that tell you to stay away from the edge.
In many cases, timidity (often a reaction to past trauma) can be debilitating.
I remember when I was interviewing at startups, and Every. Single. One. -Every one, described themselves as "unicorns."
The harsh reality is that, for every unicorn, prancing around the tech industry, there's a charnel pit, filled with the corpses of 10,000 goats and jackasses, with horns glued to their foreheads.
Not all timidity is bad, and, sometimes, ignoring warnings can be quite fatal.
Plenty of people will learn only that which they perceive to be required and no more. People managers don’t seem to be an outlier here.
I’d probably still agree with your statement though. They also definitely don’t teach us how to manage.
For that reason, training for public defender managers is usually legal training and subject-matter-specific leadership training. For example, we get a lot of training time on how to support lawyers through burnout. It is almost unheard of that we would get training on abstract or generalist management practices. Executives see it as off-mission and managers think it's a waste of time.
This problem is exacerbated by being a correct strategy at a certain (small) organizational scale, but the paradigm falls out of alignment as the organization grows. It's hard to build an intentional culture of management in an already-existing organization.
* ICs need time to think deeply. They're tasked with getting all of the details correct. Details take a lot of time, mental load, and effort. They're exhausting in the moment. It's hard to do "just one more task" after you've already worked deeply all day.
* Leaders are tasked with shaping direction of teams. They spend a lot of time reviewing and guiding "the details", but generally can't get into the weeds. They carry on-going mental burden of _everything_ that's important to the company, but can generally delegate the details to other people. Since they don't spend all day dealing with the details, it doesn't feel painful for them to "tackle a few more things".
It's kind of like the tortoise and hare.. ICs sprint, sprint, sprint. Leaders walk. They probably cover the same ground mentally, but most people are much better equipped to walk 10k miles per day than sprint 10k, 100m at a time.
It's incredibly hard to overcome that daily lived experience. Most leaders are going to be at least 5+ years separated from the daily IC grind. They've had other goals, other mental loads, other stresses for 5+ years and simply cannot remember what it's like to be an IC anymore.
It was a good enough insight that Phoenix Project basically mentioned that book for its version of it.