Sure, but even assuming Moore's Law, algorithms like SHA-2 and SHA-3 are not likely to broken within our lifetimes, if ever. For the set of hashing algorithms t

Sure, but even assuming Moore's Law, algorithms like SHA-2 and SHA-3 are not likely to broken within our lifetimes, if ever. For the set of hashing algorithms that are quantum-safe, you literally gain nothing in practice by making them arbitrarily stronger - they're already so strong that any increase in security margin is a negligible improvement slighter than a rounding error in computational time. But these improvements can come with a performance cost. There's generally no upside and only a downside for choosing to increase the strength beyond what's required for the sake of future proofing.