I think I understand the OP's position, and also the teacher's. A teacher wants to guide without discouraging and often they fear discouraging us by criticizing. Many of us do want to have real guidance. If the teacher knew all along that introductions tend to be shorter; that they don't repeat if longer - and said nothing, I'd be miffed. Actually, I'd feel insecure after that because it goes to the question of guidance.
I was a bit miffed but not any more. As others have said its up to me what I do and I am going to play it twice. I am also working on another composition. One that I started ages ago but never got round to finishing. I must carry on with that as it would be a shame to leave it half done
You might want to post a recording of some of your works in the audition room. I don't know about others, but I'm eager to hear it.