I was overly dismissive in referring to its contents as tangential (it’s a framework for analyzing media that makes some vague but bold claims about what constituted effective content on varying mediums for media at different points in time).
But he can be “famous” and the material can be relevant and the original point can still stand — they found something sufficiently relevant and mysterious and famous enough to point to as an external appeal to authority to justify the sale ads on the serving of visual opium to children. I don’t think that would have been McLuhan’s cup of tea, eh? But if you do it in his name, maybe it’s easier to swallow.