When all is in perfection and there's no point of arrival, what is the purpose of striving for mastery?
It is – to one who sees clearly – not optional. It is a matter of survival.
Observe anyone's life objectively; is this really all life is? They fight for survival or to master some skill or to accumulate wealth, and where does it lead? Into the grave and seldom into happiness. Man is in bondage to conditioning; how to think, what to buy, what is success — he is not free.
The road to freedom is through the inner accomplishment — this is what we strive for.
Secondly, a comprehensive study on stress was done on baboons, because like man, they do not have to spend all their time on survival. (In their case a few hours a day, whereas other animals graze all day, like man they have leisure time.) It was found that like man, all creatures need a certain amount of stress to stay vital. Most animals are constantly in stress from predators. Man (and baboons) are not. So the latter two groups produce stress by tensions within their tribes or groups.
We choose not to create our tension in fruitless tensions with others, but to reach for what lies beyond our perception's horizon. This is a worthy quest; to turn the unknown into the known through experience. This is the glory of a master's path.