You're right - there is a reason that the turnover is so high. And it's not because it is some unbearable job that will exhaust one. It's because it is an entry level job. In most cases, it is filled by 16-year olds getting their first job to pay for an automobile and/or car insurance.
What a bunch of bullshit. So no, you've never worked fast food in your life. OK. So you're talking about something for which you have no frame of reference. Secondly, fast food joints are open all day, so who mans the fryer, the register, the drive-thru, and the grill when all the kids are at school or at home doing their homework? Did you even bother to think about that? Of course not. Because you do
rushed, sloppy work.
In other cases, it's because that person is ready to move on to the next step up. And, in the final case, it is filled by the elderly who either become too old and sick to keep working or who pass away.
Unfortunately, that is not the characteristics of fast food workers.
This is. Your belief as to what Fast Food workers are is completely wrong and misguided, and I think you're substituting in Conservative conventional "wisdom" for facts. You do that a lot, you know. BTW -
70% of fast food workers are not teenagers.