That number sounds ridiculously high and not scientific in any way. That said, of course there are some doctors out there doing poor work. My guess is that of the recommended doctors on this site, the number of unsatisfied patients is probably pretty close to 0%. With the few misses that do happen, the recommended doctors stand behind their work and fix any issues.
Lesson here - use a thoroughly vetted and site recommended doctor who practices exclusively in the field of hair transplantation, not general plastic surgery or something else. I am extremely happy with my result.