We all use simplified models, even outside of Science/Engineering. But the models are, unfortunately, always exhibiting pathological edge cases.
I am always a bit disappointed/sad when I see people like him making such gross oversimplifications leading to grandiose claims with almost nothing to back them up.
There seems to be a "pseudo-polymath" personality type among some engineers. Based on an unexamined but deeply held philosophical belief that engineering concepts and ways of thinking neatly generalize to all fields. The pseudo-polymath engineer is an instant expert in anything he bothers to turn his mind to and subsequently systematize.
Engineers who think they have unique outsider insight into an unrelated field like medicine or cognitive science should tread very carefully. If you can, try to validate your ideas and assumptions with a subject matter expert. Don't underestimate the large stock of knowledge and discourse that already exists in these fields.
Like most positive illusions, the motivation is to forgo truth in favor of power. The difficult, far-away light that borders reality and the abyss, versus, the safe, comfortable, easy to reach thing.
Sometimes it's just fun to squint at a problem a certain way. Sharing that doesn't mean that the person necessarily think it's true. Maybe he just likes to be provocative.
But yet, I think he could do better.