Epcot? People come to Epcot because they want to hear Disney (movie) music? You're right about Disney "stuff", but that's not exclusively (movie) music. It's imagineering it's innovation, it's fun rides and attractions, it's attention to detail, its theming. It's what makes Disney theme parks stand out amongst the rest. Not Disney (movie) music. Music is indeed part of the theme park experience, and you'd be amazed how much theme park music does not actually come from a movie. Because ambience is another thing that Disney excels at.
No, you can't hear original music anywhere. That's the whole point!
And you can hear Disney (movie) music anywhere. You don't have to spend thousands to do so. If most people are so addicted to Disney (movie) music that they need to hear it then they can do that any time they want, in high quality.