This isn't about singing. This is about foreigners talking on the phone while driving. It's uncanny but nearly every foreigner I've seen doing gig work has their phone to their ear talking in their home tongue.

Nothing wrong with that unless they're driving.

1. It's distracting, truly distracting. 2. It's a possible means of working while at work.

It's actually good that Amazon didn't just record the convos and reprimand people based on an AI oversight of whether it breaks the above rules.