That's pretty cynical.

AWS is a ball of complexity because it grew organically that way, and they don't have a culture of explaining, or, keeping things simple.

Both of those things would require strong strategic guidance, and a real effort to do.

Unless Bezos edicts: "Our APIs must remain simple even as they scale, and we must document in a manner that keeps the 80% common path easy to use, while the remaining 20% arcane functionality available ..." then it would happen.

But it won't.

It's reasonably well curated arbitrary complexity, it is what it is.

This is not an issue anyone handles well.