That’s a good point. My examples are pretty bad in that regard, I admit. I would still argue that jobs do come and go though. We have many jobs today that didn’t exist 40 years ago.
About outsourcing work to costumers, I kindly disagree: I personally love self-checkout in my grocery store though. I see it as an improvement over standing in line, having to think which order to put stuff on the conveyor for optimal packaging (gotta put the heavy stuff first), still clogging up the conveyor after the cashier because you happen to have just enough bagspace, but only when you pack optimally, while 2 people look at you angrily because they now have to wait 5 seconds longer because your brain freezes over this stressful situation.
No, this didn’t happen everytime I went grocery shopping at a cashier. But enough to see self scanning as a way more relaxing time.
So for me, it’s not soing someones work, but rather that I, as the costumer, am in full control of the tempo and way I want to so things. But I understand not everyone feela the same way, and that’s ok.