While it's true that a leader usually cannot be effective without providing adequate direction to their team and "making the call" when an indecision point is reached, in my experience it's equally true that a leader cannot grow their team without being in touch with what they're working on. There's a reason that people are universally happier when they feel their manager _could_ do their job (note that the manager should not actually be doing their job - the capability to do so is the important part).
I feel that the author of this piece either hasn't experienced or hasn't yet found the way to lead a team without dictating. It is a difficult thing to do, but the proper balance will allow a leader to grow their team's skills and decision making capabilities far beyond what's possible otherwise. It is completely possible to "deliver results" while also remaining primarily collaborative and "participating" with your team - you just have to know when it's time to short-circuit and make the call.
However I'm still not sure if it's worth it in the end, perhaps it's one of these traps the article speaks of.
EDIT: I think this sort of thing proliferates in cultures emphasising egalitarianism.
It sounds like it was situation in which it was initially unclear where the bug originated, people acted as intelligent independent agents and move the issue toward the solution.
"Everyone, including that manager, operated as though they were collaboratively discussing the issue."
That doesn't sound so bad. How do we know that the manager didn't "oversee a timely resolution"? Not everything needs to be solved yesterday. Maybe allowing everyone to collaborate on the issue and let it stew for a bit lead to the best outcome.
Speed != productivity != quality.