Engineering Managers understand this too. And the goal is to minimize interruptions - and meetings are an interruption!
The problem is that the time pressures on someone on a manager's schedule are such that they do not get the information needed to make the necessary decisions. As such, Managers are in a trilemma:
* The PM makes the decision without the information necessary, and the team goes "why didn't you get me involved?" The PM or EM (Often working 50+ hours a week) then has to do rework and is not ready for the team. * The PM or EM interrupts someone on the team, reducing the team's ability to do useful work and being frustrated about how many meetings they have. * The PM/EM waits and is in a continual multitasking situation themselves, unable to do the creative work because they do not have the information necessary at the time they can do the work. (This also lends itself to long post-standups, and long hours for the PM.) Or, it turns into a "slack in a general channel and wait" situation. Slack is the same interruption in most organizations, even when not using direct mentions.
I've tried to constrain the times I meet my team around other necessary meetings, and it throws out my day trying to accommodate, and even then I can't always do it.
As an engineer, which do you prefer? (It's always great when the PM and EM are on a 7pm call because that's the only time we can do it, let me tell you.) Some engineers say that everything should be on paper from the PM, but that does not account for the extra time that it takes to put documentation together that may be based on faulty assumptions.
It's a fundamentally hard problem. Let's not treat it as trivial to solve.