True, but that reduces the problem to "not possible for everyone". If you work remotely, and have a printer next to your computer, it's entirely doable. My coworker set up his printer at his parents' house, and built a system for remote control & monitoring, including a camera pointed at the print bed. He does remote prints this way.

once the first layer is done clean, you can leave (and most people who have long running prints have video cameras watching). I do overnights all the time and rarely have problems other than running out of filament