My primary school forbade use of pencils until 3rd grade and we did math and dictations in fountain ink (it sounds ancient, but it looked nice). The result was slow work and painfully exacting writing. They also graded on a 1-6 scale, where 1 was 100% and 1- was 99%, effectively making a distinct grade for Perfect.
I like the idea of showing a child how to do a task well, consistently. It’s no different from studying a great writer to learn writing; we naturally want to know what the highest standard is in order to reach for it.
My mother sewed dresses, baked and cleaned, and taught us to read and write, but didn’t teach much of the domestic skills she had learned from her mother. I think one part of that was the shift away from needing those skills (she doesn’t sew anymore as the cost of clothes has dropped so much). But another reason might be that teaching a child these things requires incredible energy and consistent repetition. Right now I need to sweep the kitchen, do I take 15 minutes to show my child who will do a sort-of-okay job and completely forget what he learned by tomorrow, or just quickly do it myself in 30 seconds?
I think therein lies mms’ experience with her first child; you have way more time, energy and will to teach consistently with a single child than their younger siblings.