The set of sane developers and developers who are completely ignoring security considerations are disjoint.

You only get an overlap if you ignore words in the original comment.

I mean... that could be a little "no true scotsman" at that point, though.

I think the most useful interpretation of the previous post is Set A is "the set of developers who appeared sane before the arrival of AI agents" and Set B is "the set of developers who are completely ignoring security considerations".