Balance through martial arts

A very smart person has said this recently. I think it is worth quoting here:

We all know that the martial arts, at their very root, are about beating up other people.
But...if we go on from that, into the related benefits that come with training to do that, I think "balance" really comes to the fore (or at least it should).
Now...I don't mean standing on one leg or walking a tightrope.
I mean balance in the sense of adding or taking something from one side of the equation in order to even out descrepencies.
Applying that idea to humans, physically, mentally and emotionally.
For me in martial arts this comes through group training. Or at least it should do if the gym/dojo/club is serious about the growth of its members (and the members just as serious).
For example...a big strong guy has to tone that down when working with weaker people. He has to learn to apply that strength with skill and sensitivity. If he doesn't he won't progress much, will maybe injure people and come up short when he meets someone stronger than him.
In the same way someone that is weaker will have to attempt to maximise their strength. Through the applicaition of skill and the physical training itself.
Someone that is naturally aggressive will have to channel that aggression positively. Apply it where needed. Turn it off when not appropriate or counter productive.
By contrast someone that is shy or lacking in confidence will have to gain some aggression in order to "compete" or keep up with the strong or aggressive people. They will have to learn to turn the aggression on.
Each ends up in the same place but from different ends of the spectrum.
So ideally you end up with a group of people where the differences help to "balance" each person. To make them better than they would be if they tried to go it alone.
The weak become strong, the strong become sensitive, the aggressive become calm, the shy become aggressive.
Everyone gains some "balance" and the differences less noticable or less important.
That for me is where the real power of martial arts can be found.
To the point where if I ran a club I'd specifically look for things to tackle in this may. I'd make the big dude roll with the little dude. Give the big dude specific instructions to try to use skill and finesse.
Pair up aggression with shyness and tell the shy person to try to emulate the aggression.

Here is the link to the original page.