You talk about the good part of being and Imagineer, but how would you feel about your job if you kept coming up with incredible innovative ideas that would make millions of guests happy, but were never allowed to build any of them, or were constantly told to build it but with half the money it requires?
This seems like a nice way to live you life, but unless you are realistic you are just setting yourself up for major disappointment. Yes, you should never give up, but you should also not live under the mistaken illusion that "you always succeed", because that's not the world we live in. As you get older you will understand.