I never really considered myself a 'true' zen practitioner, but years ago I did regular zen retreats. It included sitting meditation, walking meditation, a mindful lunch with other practitioners, and... chores. (Maybe they used a different word - I don't recall.) One time I spent our ~hour washing dishes. Another time, sweeping the zendo.
The point of it, beyond contributing to the greater community, was to do these chores mindfully. There was no higher spirituality to it; just be present. When washing dishes, I was only focusing on washing, rinsing, drying, and putting them away. When sweeping, I was only sweeping the floor to collect dirt. When I collected the dirt, I was only collecting it. And so on. It sounds a bit silly, but it was a tremendous practice to force yourself to only do one thing and to think about that thing while you're doing it.
You said you participated in that years ago. In my recent past I accumulated hundreds of hours of meditation.
Do you see any lasting benefits from your experiences? I personally still struggle with focus and attentiveness, especially when the demand is external. I haven't concluded whether I wasted my time, or if I need to get back to meditating. It's time-consuming!
From the meditation, no. Unfortunately, that was during the season of my life when I had very young kids, and I was dedicating myself to work. Consequently, I struggled with devoting time to sitting and not thinking. I was trying to bootstrap a good practice, so Zen retreats were a great way to force myself to do it. It wasn't sustainable, though: where I lived, there was no local group (the retreats were >1hr away). So I didn't actually do a ton of meditation.
However, I feel like the retreats were a positive for me, albeit not in the same way that meditation might be. Sitting, walking, and doing "work practice" (the term they used) mindfully gave me a great perspective shift. I found doing dishes truly enjoyable and worth my effort even if it wasn't changing the world.
Maybe I enjoyed it so much because of my personality. Or maybe the retreats helped me appreciate silence and downtime, thereby changing my personality. I can stand in line at the grocery store without needing to be entertained by my phone, which is a herculean effort for many people I know. It's too hard to say :)
If you are peeling the potatoes and have a bit of whole-hearted potato peeling and then immediately go off "wow, I was really focused there, what Zen potato peeling!" for a minute, well, those thoughts are not Zen spirituality. It's a common problem with reading or listening to stories about whole-hearted activity - one fills up with "Zen thoughts" for a while.
It is a good example of absorption when the objects and subjects drop away leaving just the action. However, as the Sutra’s say: “to encounter the absolute is not yet enlightenment.” One can argue with family in the same zone of full attention and ease of effortless action.
The point of it, beyond contributing to the greater community, was to do these chores mindfully. There was no higher spirituality to it; just be present. When washing dishes, I was only focusing on washing, rinsing, drying, and putting them away. When sweeping, I was only sweeping the floor to collect dirt. When I collected the dirt, I was only collecting it. And so on. It sounds a bit silly, but it was a tremendous practice to force yourself to only do one thing and to think about that thing while you're doing it.