Why do people think that? A lot of cars are poor quality by design and choice of material. I drive German cars and there are certain choices in design and mater

Why do people think that? A lot of cars are poor quality by design and choice of material. I drive German cars and there are certain choices in design and material don't stand up to time. I understand why those choices were made (70% of luxury cars are leased and aren't expected to be owned past 5 years). From an engineering point of view, the cars were optimized for a certain "fitness function". I imagine American cars were designed to optimize for certain constraints too. I also know that a large number of Japanese brand cars are in fact built in the US by American auto workers. And their quality and reliability are as high as those built in Japan. The view you espoused is fairly common but I don't understand why UAW would lead to poor quality cars when cars are designed and built using standardized procedures with machines that perform the same each time (not a rhetorical question, I really don't understand where this view comes from)