Any given person can fight well. BJJ fighters can fight well, Kung Fu Fighters can fight well, Russian Sambo fighters can fight welletc etc. It all depends on the skill of the each individual fighter.
Because you have not seen me fight..... how do you know so well that my eye poking or groin striking is good or bad? How would you know if I would or would not rip a new ass.hole in those BJJ 4th and 5th degree fighters?
Do not make assumptions about anyone or any style until you have been there and done that else you make an ass of yourself.
ginosifu