Amazon has some of the best uptime in the world, especially for basic services like EC2, even if you’re only considering the least reliable regions like US East. Their last major event was in 2017. There are few providers in the world that can compete with them in that respect, and there’s nothing that you or I or anybody else could build with 6-10 servers that could come close. If you were planning to try exceed their service levels yourself, there is no conceivable use case where a small to medium sized company could justify the requisite expenses to provide the redundancy and operational coverage necessary. What you are actually talking about is that you can meet your own needs without AWS, which is entirely plausible, but completely different from the absurd claims that you can build a low budget infrastructure that exceeds their service levels. That claim is so ridiculous, you might as well be saying that you can make a car faster than Toyota can, or that you can run a two minute mile.