No Rest

Amazon doesn't want human workers. They want machines. You are always standing for long hours during every shift, even if you have to go 15 straight hours. You only get one 15 minute break after working every 4 hours and 10 minutes of that is spent walking back and forth to the break room, so it's really 5 minutes. There is no rest, just straight work. This is physically draining. No homo sapiens can keep doing this for more than a few months, so that's why the entire FC turns over all actual workers (and not the useless managers) every year. Why is this acceptable in the 21st century?