I left Amazon a few years back because this ending was the inevitable outcome. Amazon had a chance to reinvent themselves as the scrappy startup that they claim to want, but instead they went full IBM.
Basically, the management class despises SDE worker class, and thinks of them as overhead. Recent statements by the aws head about chatGPT replacing SDEs is along the same lines.
SDEs are tools that just do what mgmt tells them. mgmt holds the decision-making and all the cards.
periodically there is a whipping (pipping) in the form of a layoff to keep the troops in fear.