I'm a technical architect by trade and profession, this is how I earn my living. Students have apprenticed under me over the years. This is not how I would approach teaching computer architecture. He's teaching basic principles. In my view, architecting systems and software is an advanced topic, in the 600-700 difficulty range. The material he's teaching is in the 100 range. It's very theoretical, and I firmly believe that teaching architecture needs to be a very practical, hands-on experience, and that the prerequisite is about 20 years of professional system engineering experience first: technical implementation experience, systems experience, integration and testing experience in the area of small and large scale systems. System, network, and database development and administration. Digital logic circuit design. Requirements gathering, documentation. Those would be the prerequisites for teaching someone to become an architect in the context of computer science.
What he's teaching is introduction to computing. The course is a misnomer. Computer architecture is about designing systems, not operation of the system.