Quibbling about how "perfectly secure" is impossible is a complete red herring. Yeah, using known techniques cryptography is not perfectly secure, it will just take billions of times longer than the age of universe and billions of times more energy than exists in the entire universe to break it. It is a distinction without meaning.
Making the computerized parts of a system go from 1 M$ to defeat to 10 G$ to defeat while employing human-error resistant design makes attacking the globally-addressable endpoint go from a cost of doing business to grossly uneconomical. It makes the cheapest, easiest, and most accessible way to attack into a nearly impossible wall and they have to look elsewhere to much less scalable vectors. You do not get the necessary 1,000,000% increase in security from 10% or even 100% improvements here or there. And you most certainly do not get it by listening to the people who are not even within a factor of 1,000x of knowing how to do it right.
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Quibbling about how "perfectly secure" is impossible is a complete red herring. Yeah, using known techniques cryptography is not perfectly secure, it will just take billions of times longer than the age of universe and billions of times more energy than exists in the entire universe to break it. It is a distinction without meaning.
Making the computerized parts of a system go from 1 M$ to defeat to 10 G$ to defeat while employing human-error resistant design makes attacking the globally-addressable endpoint go from a cost of doing business to grossly uneconomical. It makes the cheapest, easiest, and most accessible way to attack into a nearly impossible wall and they have to look elsewhere to much less scalable vectors. You do not get the necessary 1,000,000% increase in security from 10% or even 100% improvements here or there. And you most certainly do not get it by listening to the people who are not even within a factor of 1,000x of knowing how to do it right.