My point is that it will do exactly that. Every system will be made quantum resistant before that happens.

This is like using an older encryption algorithm and just acting like it will never be broken because if it was, then all systems built on it would break. That’s not what happened, the older algorithms were broken, and better ones replaced them.

It’s only a matter of time until quantum computing does this. Whether or not that is within our lifetimes is irrelevant.