The risk of scrum

He published the slides on slideshare: Ralph Jocham The Risks Of Scrum.
As far as I understood it, Ralph identified two Risks with Scrum:
- Not doing it right or not practicing it to the full extent
- Neglecting technical excellence and accumulation of technical dept
According to Ralph the second risk should be met with XP practices that focus on technical quality.
But in my opinion there is a much more fundamental danger in scrum:
This is dangerous. "Embracing Change" and "Getting Things Done" are two opposing forces. On a certain level it is inherently not possible to get things done while embracing change.
Scrum as an agile methodology is all about embracing change. With the focus on the Done-Stage on the Taskboard and the "Definition of Done", Scrum claims that those two opposing forces are actually not opposing. This is in most cases an illusion.
This is mostly a result of focusing on small stories with immediate business value. Getting these stories done is possible, and Scrum can easily misused as an "excuse" to neglect the big picture.
Progressing in Scrum means getting stories done. Often the real progress of a finished story in regard of the whole project is not measured...
A symptom of this antipattern is that certain things get touched and changed again and again by new stories in subsequent sprints... so what was actually done, the story or the real business problem?
Shortening sprint duration and focussing on smaller user stories can even aggravate this problem ...