It doesn't really matter, the person that files the patent thinks they invented something worth protecting, spend the money to have a patent attorney prep and file an application. If the USPTO agrees that its not infringing on an existing design etc then they approve it, if its a utility patent then they just have to keep up with the fees to maintain it. Doesn't much matter if you, me or anyone else agrees with it, it was approved and now he has a legal right to protect it.