I won't argue with that one bit.
Well, I think people bought Toyotas in the 70's for several reasons: First was gas mileage. Second was immediate availability of gas saving vehicles. Third was the slow response to the market by GM, Ford, and Chrysler. Fourth was how much nicer their small cars were compared to Mavericks, Pintos, Chevettes, and Omnis. Fifth was price. Hondas and Toyotas were very inexpensive cars back then.
There was a lot of bloat in Detroit. During the 1970's, according to Autoline Detroit, GM hired tons of new workers, mostly unnecessarily. The bloat was just overwhelming, and the hierarchy to support such size was full of bureaucracy. It was just a tremendous mess. Since WWII, we went from many competitors on the market such as Nash, Packard, Hudson, Studebacker, and others to the Big 3 and AMC. They got fat and lazy.
I really don't think that the UAW had much to do with the problem. It was poor management and an inability to respond in a timely manner to changing market conditions. They blamed government regulation and they simply didn't take the foreign threat seriously.