It sounds to me that you have discovered an important and often underestimated property of disruptive ideas. How did an 18 year old change the way we communicate online forever? How could a clerk at the patent office usher in the era of 20th century physics?

It's possible and maybe even easier to have truly breakthrough ideas if you're coming from a different field. You can always catch up on all the knowledge required to execute your idea later.

And yes, often you'll find out that your idea wasn't so great. But at least you didn't dismiss it as out of hand because you didn't come across it in your years of experience in the field.