I think you're missing the point - you may need to move to your own infrastructure for security, privacy, regulatory or accountability reasons. You may encounter new needs which AWS may no longer meet, cheap bandwidth for example (AWS bandwidth is both way overpriced and on some rather poor networks). Or Amazon may decide that the price of all their serivces is now going up by a factor of 5 and if you have your attitude, well, you're stuck paying for it.
Having relatively easy to spin up alternatives is a great thing. I can run my application entirely on a local kubernetes cluster or one on Amazon, DigitalOcean or Google's cloud services. That sort of flexibility is excellent and has allowed us to scale into situations where we otherwise couldn't have affordably done so (being able to buy some bandwidth from Joe Entrepreneur has it's benefits sometimes).