1 in 100k is a stretch. But 1 in 10 maybe? Physically we need water, food, shelter and medical care. Around 10% of US workforce is in agriculture, but a decent chunk of that is probably for providing non-essentials foodstuffs. So maybe only 10% work on actually providing all the essentials for human life.
Last time I was at the doctor's for a bone fracture I have been treated by people with tens of years of experience and education, in a gigantic building, and my bones were scanned by tools that cost millions and were science fiction 2 generations ago.
Water food and shelter are not all there is to a comfortable life.
