Your idea of what innovation is contradicts what is generally accepted as such, including that on wikipedia. A good idea is just a good idea. For it to be an innovation, like Chupa Chupa said, it has to be "disruptive" or change the way society does things in a way. If it does not, it's not an innovation. It's just a good idea. By your definition, I can create all sort of stupid things with absolutely no practical use in my basement that no one has ever heard of. But because it simply does things differently, you call it innovation, which is untrue. It is inventiveness, sure.
No, your idea contradicts the basic definition of the word, which includes none of the above. By your definition, an idea might be "stupid" for no other reason than you haven't heard about it.