The best encouragement that I can give is well
1. Its your life and you should do what you want to do, not what others want you to do.
2. Disney is a huge worldwide company thats known by everyone as a respectable enterprise. Can you imagine the doors that would fly open by having the name Disney on your resume?
3. Its a great experience that will allow you to broaden your mind, and earn work experience in a secure environment that will encourage you to learn and to grow.
4. Its one of the best ways to get your foot in the door while still in school. This way, once you graduate, youll have all these contacts that youll be able to use in your professional career, no matter what you do. (Also, theres probably no better place to network then Disney).
I hope this helps some, cuz its all true! And I wish you the best of luck!!
And... if Disney ends when you're 10 then why are there hundreds of thousands of adults not only making money there, but also having a great time doing it?