I dressed my own first deer...I was all alone and had no choice.
Fast forward a few years. My nephew had taken his first and was completely unprepared, having not an inkling. Didn't even have a knife with him. I lent him my knife and offered guidance. He punctured the rumen despite my warnings. Then he struggled mightily with the pelvis. A this, mind you, after listening to him talk for days as though he knew all about these things and had done it many times. I stuck my hands in my pockets and let him do for himself. I learned later he was telling the family how he f'ed up his deer because I didn't know what I was doing.
Mean old uncle that I am, he won't be hunting with me anymore and he hasn't spoken to me in years. C'est le vie.