Two asymmetries worth separating here:

1. Government ban targets the USD on/off-ramps (KYC exchanges, banks, miner hosting). It can drain the value bridge but cannot touch the protocol — node count went up during China's 2021 ban.
2. Quantum is bottlenecked by what must be broken: secp256k1 ECDLP on exposed pubkeys. That's P2PK (Satoshi-era), reused P2PKH, and live-at-spend-time pubkeys. Dormant P2PKH / P2WPKH / P2TR hashes stay HASH160/SHA256-shielded until broadcast. So the attack surface is narrower than often stated — and NIST's PQC roadmap (FIPS 204/205 finalized 2024) is years ahead of a capable fault-tolerant quantum computer.

Barbour's take holds if you value existence of the network. For holders of reused-address UTXOs, quantum is strictly worse because it's silent and irreversible.