After taking a few minutes to think about it, my guess would be that it would show you that the course is so easy that you can run it with two hands. Meaning it's main purpose is to show you that you are trying way too hard to run passes that you can run with two hands. Two handed turns are much larger, more balanced turns, albeit akward ones. Taking the time to complete turns is a vital aspect to running your top speeds and line lengths. I prefer explaining this to people that I ski with and work with them to make the changes with one handed turns. To each his own though, so if it's been advised to you by a professional, I would give it a whole hearted try.