Given the list of very large companies in the "glasswing" project - it is likely every competent state actor and criminal organization already has access to Mythos in one way or another. Meanwhile the opensource volunteers responsible for the security of the entire internet don't have access.
So then why expect that you're making the world safer by limiting the capability that your vendor locked customers have access to while attackers will go find the best de-censored model that works for them, wherever they can find it?