Scrum Teams are often Coached to Death, while the Problems are With Management

I'm sure sales understand the issues. They just don't care because they're paid to close sales. That's how they get their bonus.

After that it's not their problem.

In a sane world, sales would be paid on delivery and customer approval not on close. Which would require negotiating realistic deliverables with the people doing the actual delivering.

But if you try to run your company like that, the sales people leave. The entire sector is used to its privileged and unrealistic status, and the clean up is left to developers.

It's a political problem and needs a political solution - one where the relative status of sales and development changes across the industry. No amount of scrum/kanban/whatever is going to fix it.

Scrum Teams are often Coached to Death, while the Problems are With Management