Martial arts training has the potential to make you fit, agile and strong.
It is often a lot of fun.
Students typically become self-disciplined, patient and calm.
And, you become increasingly seasoned to combat.
Whilst this does nor guarantee success against a real life assailant, it does mean that you have the reflexes and the awareness to handle adversity in whatever form it takes.
This may not be what the on-screen action heroes tell you... but remember: they are not real people. They are fictional characters.
Do not get confused.