not a valid analogy. the analogy is more like,
there's a safe with keys specially designed for it. you say "but i don't like having to hold the key myself. i want to ask my buddy in europe for it whenever i want to open the safe." actually, no,
it's like there's a safe with a key designed for it. and you are asking your buddy in europe to hold the safe *and* the key.
and when you want to visit it, you yell across the ocean "hey, send me a safe and a key that will open it"
and he sends you *a* safe, and sure enough, the key opens it.
whereas the situation right now is that you have the safe, and ask somebody for the key that opens it. then you can learn for yourself that if the key in fact opens it, then it must be the right key for your safe.