Everything you have said is part of ID school. They all show you how to make things and to think outside of the box. Thinking outside of the box is a core component of being an IDer.
What do you mean by “trapping” yourself in the ID field? ID is enormously broad, so could you give some examples of other fields you would like to work in? They might all be more connected than you think.
I think you’re focussing too much on what you might not get out of school vs what you will. You can work on absolutely anything that you want outside of class, and that’s where most of my design development happened through school.