I long ago saw a proposal for a country-scale medical training system designed for graceful upgrading. A highly experienced nurse, wishing to become a doctor, just learns the delta, rather than restarting from scratch. Similarly for a community heath worker moving into nursing, etc. And a different proposal, for automated support and oversight of community health workers' hard-to-take-well cervical-cancer screening photos, integrated with ai-filtered city-based expert consults. And then there's patients who become single-disease domain experts.
So looking forward, perhaps we could imagine a human-computer-hybrid setup where a grandma training and executing with oversight was gracefully supported? Especially if haptic vr becomes widely available.
And then scroll around Google Maps to see how many nail and hair "salons" are running in someone's private home.
My dad grew up the youngest in a relatively poor family in Montana with four kids and a father that drank most of their cash away. My dad really needed braces, but they couldn't afford to pay a dentist, so my grandmother got a part time job as a dental assistant and paid very close attention to the process of installing and removing braces.
After a few months, she "borrowed" the materials required for braces, and installed them on my dad, and removed them about a year later. Apparently it worked out fine, my dad's teeth are alright.
Obviously, things going "alright" is more a matter of luck than anything else: there's a reason that people go to dental school, and they were fortunate that there weren't any complications, but I always thought it was amusing that that's how my dad got his teeth straightened.