Think it like this, your captain has set a post for you and your duty is to always be ready for his next command. Do not complain or hinder yourself from the necessary training. Therefore, when the time comes for you to depart from the post, you’d be gladly to do so. Be contented and certainly grateful by this opportunity, make it worthwhile though it is short lived.
Train your rationality, perception and actions during this course, be discipline and conscious no matter what kinds of adversity happen in your life.
Why do I need to do this?
The question is why not?
But, it’s hard.
If you find this path is no use whatsoever then leave without regret, choose another path which is more suitable for you.