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UX vet here.
UX usually never ever has the final say on this stuff. Product management, finance, and marketing almost always win out in most companies. Heck, in just about every agile training that is given, people are taught that product management gets the final vote on whether or not a feature gets prioritized.
Amazon is famous for being driven by bean counters and analysts. Many of their product development decisions are driven by measurable short term incremental tests. Amazon has never really known how to build physical or digital experiences that people love.