I would disagree. Sure, you don't own the hardware, but you have total control over Embrasure's functionality within your self-contained instance.
Wikipedia: "Self-hosting is the practice of running and maintaining a website or service using a private web server, instead of using a service outside of someone's own control."
Yes, correct, AWS Secrets Manager is out of your own control. You don't control it. AWS does. They can change it or even end it as a product any day they like.
Wikipedia: "Self-hosting is the practice of running and maintaining a website or service using a private web server, instead of using a service outside of someone's own control."