Bird, I understand your point, and it is valid, to a point. If everyone followed CR's recommendations we would all indeed drive nothing but Honda Accords and Toyota Camry's. They have only rated trucks twice in their history, because trucks are too specialized for their view of "best" vehicles.
I do think the one area where they do shine is their reports on actual car repair history. That is objective, and no one else does it as well as they do. But when I want a Mustang convertible, I want a Mustang convertible, and I dont care what CR says.
Where I really think they are worthless is when they pompously rate things things that are wholly subjective, like what's the best peanut butter or ice cream. Back in my drinking days, I bought a certain brand of Scotch because it was a CR "best buy". But, of course, I did a lot of dumb things in my drinking days.