> You can't

It's a moot point, they are not trying to prevent it. They only need to buy enough time to sell games in the lifespan of the hardware, which they did.

> all the security they can economically justify...

It seems like they did a perfect job, it lasted long enough to protect Microsoft game profits.

Well, they had better hope nobody notices how to use this flaw to chain into another one in the current generation.