The point here is that the movement against IPv6 for security reasons is disingenuous or even outright dishonest. Those security reasons don't exist.

Personally, I have never seen any argument for IPv6 based on security (except for some very fringe ones about address enumeration). But if anybody makes one to you, well, it would be disingenuous, or maybe even dishonest too. There is no security-based argument either way.