two knee braces? need some feedback.

so i've been debating over whether to get another knee brace for my right knee (which i haven't blown out yet). notice how i say the word 'yet' because knee injuries are so common in wakeboarding, they almost seem certain. so therefore, it's not a question of if.. it's a question of when.

over two years ago i blew my left knee, tearing everything, and i got a CTi2 which i wear every time. i pay my own health insurance and i just got treated for a broken foot. i talked to my doctor about getting a knee brace for my right leg for preventative reasons. all she did was write me a script... but i am debating whether or not to get one. i heard different opinions like stretching and working out is good enough and that wearing braces all the time will make my knees weak, but if i wear the braces to protect my knees only when i ride and not wear them when i work out, would they still get weak?

all opinions welcome...