This environment is conceived when an individual is the canonical source of their own credentials. I get jealous of doctors and lawyers because someone else grants and revokes their credentials. You either are or are not a doctor. It doesn't matter if you're a good one or a bad one, you still have this boolean state: yes, or no. But the UX/UI/whatever yields these coffeehouse quality debates that fatigue everyone and solve no particular issue other than a redistribution of the shared, global volume which inflates egos. You're a UX person and I am not? Fine, can we just not worry about it any further? No one's car is going to crash or heart stop.
I come from a graphic design background and I really sympathize with the author's grievances regarding the field but I can't help but to have a disdain for his victimized tone and lack of business knowledge or insight in all of his writings on the subject of flat design, code-first, function over form etc.
I believe he has not yet reached the truth and real drivers behind all of these concepts and developments in the field.