Of course Netflix isn't going to stop showing you movie options when you're trying to discover something new. If the user doesn't intentionally know what they want to watch, they need to continually see content to discover it.
And Amazon search isn't terrible because of a price-hiding scheme, it's because they have a terrible UI company-wide, from the Kindle to EC2. People typically aren't browsing Amazon to discover new products - they search and move on. Are you suggesting that Amazon search should be an internet price aggregator too?
It seems like you're playing the Halloween music early by saying these companies have terrible UX as a complex ploy to keep you engaged while not giving you what you want. The reality is that they have wide userbases which are fickle to UI changes, and it takes time and research to roll out anything new.