Who is vulnerable to traditional martial arts?

Traditional martial arts are vulnerable to fake masters.

Traditional martial arts are rich in content and have many sects. Not all traditional martial arts are vulnerable.

For example, the hands of this person practicing Iron Sand Palm, who dares to say that they are vulnerable to a blow.

There are fake kung fu masters who deceive people. We cannot completely deny traditional martial arts just because there are fake masters. This is too narrow-minded.