Andy Jassy was the first product manager on AWS, and while there is lore debates whether he "came up" with the idea of AWS (probably not), he's been on it from the beginning and through every single product.
I don't know much about Selipsky or Garman, but Jassy absolutely was/is technical enough to get to AWS to where it was today (or know when not to get in the way of those more technical than him).
Watch any of his interviews from before he was Amazon CEO. The man knew his shit.
I don't dispute he is an excellent manager and an excellent CEO. But excellence is execution does not drive vision. The times demand a different profile, as AI is not there yet, but can within the next 24 months become really disruptive for many business models.
One example: Amazon generated $14.65 billion from its advertising services. And Google a gazillion more. But if I send an AI agent searching for me or shop on Amazon, they don't care about the ads.
I don't know much about Selipsky or Garman, but Jassy absolutely was/is technical enough to get to AWS to where it was today (or know when not to get in the way of those more technical than him).
Watch any of his interviews from before he was Amazon CEO. The man knew his shit.