While this wasn't a good article about security, for what may be any of several reasons that don't have anything to do with his work relationship with Square or qualifications in general, I'm not childish enough to pretend that a single bad article dictates even his merit as a security professional. We've all been there and said something silly in public.
That being said, this read like a strawman of a popular comic to sell his research/pet topic, and poor security articles like that should be called out for what they are - poor articles on security.