Except that this is an API which is not yours that you've found by reverse engineering. You're constructing an analogy where the authorization surface is much

Except that this is an API which is not yours that you've found by reverse engineering. You're constructing an analogy where the authorization surface is much less distinct where you're already allowed into the building because that makes the surface much less distinct. That analogy isn't at all obvious to me and I don't think you've offered any rationale for why that is more appropriate. Once you start playing around with someone's remote API then I'd strongly advise you to consider it more like a door around the outside of a building. If you want to argue about that with me, then you may wind up arguing about that with a judge.