Low tech doesn't magically create utopia. But look at it from another angle. Your task is to design a society where nobody is ever forced to do anything. Are you going to go high tech, or low tech? There have been societies where nobody is ever forced to do anything, and all of them so far have been technologically simple.
For growing food, the most motivationally robust system is a semi-wild food forest, full of perennials, self-seeding annuals, and wild game, all powered by a fusion plant called the sun. There's a lot of room for highly motivated people to make this system work better, but there's also a lot of room for idleness.
From Ran Prieur’s 074.
"Motivationally robust" is an incredibly thought provoking idea. The thing about efficiency is that it is incredibly misleading because it only focuses on one isolated aspect at a time. If you look at people's individual lives today, their personal time is spent in incredibly inefficient ways because all of our main needs are scattered in different activities and containers. You go to one place to exercise, because your job doesn't involve any physical activity, and on top of that it requires significant commuting. Then you spend additional time to socialize, because exercising or working or commuting don't provide for that need, and so on.
So while individual machines are getting more efficient, it is incredibly unclear whether human life as whole is. I would say no, see more from me in a small piece about 'Belonging you don't have to earn', but in isolated aspects it can be. But one thing that is very clear to me, it isn't motivationally sustainable, there is simply too much coercion required to make systems and institutions function.