Precut seems to be the better solution than a machine.
It doesn't even have to be low paid humans doing the precutting, it can be a big machine that only needs to be cleaned every 1000 potatoes or whatever.
You're probably right. Although precut vegetables don't last nearly as long even if you don't mind paying the premium. (And, of course, you don't have the same degree of control.)
Generally though, in the absence of additional home automation options that could save time and effort, the overall approach has been to do exactly as you say. Eliminate end user work in the manufacturing process and other places.
There are lots of examples in food. Modern clothing wrinkles less (and many people just don't care as much). Autopayments and online banking. Amazon.
It doesn't even have to be low paid humans doing the precutting, it can be a big machine that only needs to be cleaned every 1000 potatoes or whatever.