How does changing the key matter, if you cannot get the key out of the SE in the first place? If I have 2 doors and I don’t have the key for the outer door, the key for the inner door is useless.
And as I said, it does not have to be short, it does not have to be numeric, and it could work.
If you disagree with my assessment of how SEs work and what the incentives are for the HWW market, as someone that is working on HWWs and secure elements, you can and I can’t stop you really.
Many flat earthers also disagree with people that have gone deeper into this than they have.