Whatever remaining security holes there are with secure enclave, they have nothing to do with a software chat app.
This is entirely coincidental and has nothing to do with anything.
TechCrunch should be ashamed of itself (again) for being such a douchebag.
Edit: I'm not saying Apple hiring the guy is stupid. I'm responding to the hattery from the article itself.
As a hire, it makes sense. But trying to decide that it means "Apple is now serious about security" is just a bunch of horseshit on both ends.