1. The US government paid millions in grants to Universities such as MIT to develop a blue laser. They were not able to do it. The laser was developed by an engineering hobbiest in his garage working on a shoe string budget. He was not constrained by conventional thought within the field.
2. Columbus discovered the "new world" against the advise of the scholars of his time.
3. Soft white bar soap was discovered by mistake when a batch of soap was left in the mixing machine overnight causing it to be whipped up.
4. I have framed a quote from Dan Bennett PhD, University of Chicago:
"How monotonous the sounds of the forest would be if the music came only from the Top Ten birds."
There is something to be said for fresh eyes and minds in one's field which have not been limited by conventional constraints. This may be why most great ideas for new inventions are conceived by people before their 30th birthday....they don't know it's not possible.
Don't disregard ideas from the untrained too quickly. Their voices add to the music of the forest.