Earlier quoted context omitted.
The point of doing something non-scalable is that you can enter and exit the market fairly easily. You don't need to be a tailor your whole life. You can make a living as a barber, electrician, teacher, or nurse. I'm not saying it's easy ! It's hard as hell. It sucks when your job gets automated. I'm just saying that aiming for something non-scalable means you're not always tilting at windmills, and the game can't be…
All of those professions you've listed require about half a decade of dedicated training to be legally allowed to practice. For example an electrician takes like 7 years to become qualified, that's a full time apprenticeship, and it pays badly in the meantime. A fact endlessly annoying to electrical engineers who legally can design their houses power system but not work on it. (I mean I think a barber is quicker, but…
Using a similar playbook for what happened to SE (loads of good ~free info, bootcampification) you can drastically reduce the time to be economically useful, but that can only go for so long due to saturation. Especially residential electric work (or other trades) is no witchcraft that would require anywhere near several years of education/practice. And yeah, the legal system would have to cooperate, which will only happen when the pressure becomes high enough (see e.g. debates around "Meisterpflicht" in Germany).
That said if AI continues to progress like it currently does we may not get to that part.