As someone that moves around a lot, I appreciate how willing Amazon is to take care every order-related issue, with zero fuss.

I fail to see what the "security" issue is, other than Amazon choosing to lose some money on fraud. That's not a security issue to anyone outside of Amazon, and Amazon seems clear in their stance.

Edit: A much bigger problem is Amazon's use of OnTrac, which repeatedly fails to make deliveries. Even in downtown SF.