I would have to say that as a tech person in general, the blog post would have me avoiding looking for jobs there full stop. Sometimes you find good people who aren't perfect for you but you know will work out. I worked with an engineer who was an exceptional perl/systems developer. I bumped into a former colleague who asked how the other guy was doing and said that he would love to hire him despite the fact he had no experience with his new job's technology as he knew that he would be an asset. This is why saying "You need to have worked on product" or "You need experience in industry X" is very short sighted. In some roles, it's required, in other roles it's an added bonus. Founders, recruiters and hiring managers need to understand the difference.