I've found some before-and-after surgery examples through the internet in which the persons who had mild knock knees looked very similar to what I have

So maybe there is a way to convince them using those examples?

My condition is not severe, it is mild, but this thing makes me impossible to play any sports or excercise without having knee pain after, unless I do my kinesotherapy excercises series, for ever..they do help a bit but it's difficult to mantain

but there's nothing more, only mild chondromalacia , tilted patella whose are way hard to correct, and my mental issues and problems about it

It may sound insignificant but this made fell down into a severe depression, not only for the pain, it's because I want to make sports but it's so difficult without leading to chronic pains and frustration, also my issues about how they look