I have heard this before but never believed it. I like getting grades on my written pieces and seeing myself improve and be given specific tasks to accomplish since I am so, so unstructured.
I used to be an English major until I tried it and I grew extremely tired of the formal classes - some of it was irrelevant, some of it was inaccurate, dull, etc.
Now I am taking political science classes which has left me without interest once I am done with the classes because I am done and still figuring out the complete bombardment of information. Somehow college courses just takes the fun out of previous raw passion. Not to say that I will change my major, but something I heard but never believed.