Hi Frank, thanks for sharing your experience!

To add to the four items you shared, what I like to emphasize with management is that they together with the Scrum Team have the same goals. And because of that, we need their involvement along this journey with us. It's too often the case from my experience that management/stakeholders/sponsors want the "thing" and then disconnect from the process altogether.

When they're on the journey with us, they become part of the process in determining the logic and reasoning behind deadlines (and why we sometimes have to move them).

You touched on it with your first point, and the way Sprint Reviews are set up, there's an opportunity for those outside the team to inspect and help with adaptation each Sprint. The problem is when those stakeholders don't take advantage of the "opportunity" and fall off the journey, no longer providing the valuable feedback the Scrum Team needs or helping to remove roadblocks. So we need to find ways to keep them engaged throughout.