Re read the thread, I said if the majority of the advance student can not adequately defend themselves should they get sued. I did not say if one particular student gets his ass kicked.
Example in the 90's there was an issue where korean pilots kept crashing.
There were 5 crashes in two years. In response the canadian goverment banned all korean flights from canadian air space.
If a school is advertising self defence then a significant portion of its student should
be able to defend hemselves