You could learn it if you really wanted to. Your teacher can't stop you from doing that. However, there is merit to his argument. I'd say deciding to use this piece for college auditions is a bit risky if you don't already play it and know what you can do with it. For something as important as a college audition it is wise to pick music you are comfortable playing, and even more so be able to communicate your ideas of. Have you tried out the piece yet? You may have a better idea of what is involved if you work on some parts of the piece. Don't just pick the whole first page. Select small sections of varying material from beginning to end.
Technically speaking, it's not an issue for me at all (I read through the entire thing). I'm guessing that I lack the musical maturity in order to play it. And yes, he did mention that there is no need to play incredibly difficult pieces at an audition so why on Earth would someone do it unless they can play it incredibly well.
Well, your program as it stands is quite an impressive one!Personally I find the biggest technical challenge in Barcarolle is to make it sound good - lyrical, beautiful lyrical sound all the way through, including the big, chordal recap. More often that not, I always find it frustrating to hear it played (or perhaps chopped is more appropriate) by pianists because they don't have a good sound for it - even in international competitions.