He kind of touches on this in point IV, but never mentioned specifically: the cost comparison is not AWS vs ovh. It's fragment-of-EC2 vs ovh.
If you need a predefined small number of VMs and no other functionality, it would be silly to go with AWS. But on the other hand, if you want a set of servers of a given class spawning on demand, with traffic coming in via load balancers, with integrated certificate and DNS management, with programmable lifecycle hooks, with integrated authn/authz, with full audit logs and account management, with configurable private networking to other services, etc. etc. ... You'll pay more than the price difference for someone to implement all of that from scratch.
Compared to this many other points sound like conspiracy theories. Meanwhile people either don't know they can do better, or use AWS because they want more features.
If you need a predefined small number of VMs and no other functionality, it would be silly to go with AWS. But on the other hand, if you want a set of servers of a given class spawning on demand, with traffic coming in via load balancers, with integrated certificate and DNS management, with programmable lifecycle hooks, with integrated authn/authz, with full audit logs and account management, with configurable private networking to other services, etc. etc. ... You'll pay more than the price difference for someone to implement all of that from scratch.
Compared to this many other points sound like conspiracy theories. Meanwhile people either don't know they can do better, or use AWS because they want more features.