Truck companies purposely sell shitty bushings in their trucks to save costs and encourage the sale of aftermarket bushings.
Pros were encouraged in their setup videos to pop shields so that kids and consumers would start doing it to sell more bearings, how much longer they last without popped shields is very significant.
Shoe brands like adidas and Nike use good materials for the first release of a shoe when all the reviews will be done, with each subsequent batch made they use cheaper and lower quality materials in certain places to offset lower sales and increase their profits.