You could probably make an argument that it's for similar reasons that scientific advancements often (though I'm not sure exactly how often) come from people outside the field.
I'd expect such an argument has been made by people - perhaps someone here might know of some examples.
I think that notion may be a case of "story bias". The stories of scientific advancement coming form those outside the field are so much more interesting that they get told in vast disproportion, making it seem they are the norm.
I'd expect such an argument has been made by people - perhaps someone here might know of some examples.