Right, but shutting down v30 won't protect us against this attack, and if anyone is genuinely trying to build defense against this, then making people believe it will is downright counter-productive.

I don't understand the logic behind people that think in absolutes. The ability to do so now takes expertise. Even safes are cracked with expertise, and are not 100% effective against a motivated party. That point is completely irrelevant when asking if something should be allowed by protocol as a standard.