Regarding the riding skillz [sic], to paraphrase from the world of aviation ...
Truly superior cyclists are those who use their superior judgment to avoid those situations where they might have to use their superior skills.
The cyclists in the video may be displaying a level of skill, but they are not superior to those of us that make an effort to avoid needing to use that skill.
Regarding the maiming, it appears to me that the concern is more for the harm you are inflicting on others who have no choice in the matter as opposed to any self inflicted wounds you acquire through your own misjudgments and mistakes.