I agree that currently it may not be the same as brute forcing something like an AES-GCM, but that isn't my point. My point is just that, if you have a blockch

I agree that currently it may not be the same as brute forcing something like an AES-GCM, but that isn't my point. My point is just that, if you have a blockchain with sufficiently high (and distributed) hash power (relative to the amount of computing power any individual actor/group can obtain), then in theory, you start being able to make strong guarantees about consensus.