I agree with your statement. As for scenario of forcing change, it reminds me of when ETH rollback DAO hack through hard-coded logic. While majority of ETH community support the rollback, i certainly hope the opposite would happen in this scenario.
There is a significant difference. After the DAO hack, a rollback was proposed by those who lost money to it. It was the Ethereum Foundation and people close to the project. They wanted a redo and to go back to a post where they don't lose their money. But no hack or brute force has happened here from quantum computers. There is no fake governance structure attempting to recover what they have lost unless there is a reason to believe that J. Lopp and the other authors of the BIP are in fact satoshi, wanting to regain access to bitcoin whose keys they lost.