The problem is that the manager's behavior is likely a result of incentives. It's not that managers at amazon are worse people than managers at other companies. And if their incentives make it so hard for them to allow longer breaks or help employees that are feeling unwell, it is Amazon's fault that this happened.
And I'm sure the stated policy even within Amazon is that a medical issue should be immediately reported and a medic called. If the manager disregarded that policy for whatever perceived or real incentive...then that's still their fault.
This is disregarding reality. If incentives aren't aligned with policy then you'll get bad outcomes. If the company says "report medical issues" and also "no downtime" then you won't always get people reporting issues.
Sure. And it's a problem within the company that amazon will have to fix. But right now, for prosecutors, I can only imagine that the manager will be found criminally liable.