Well, that was a home run response, Donna Jo!

Your ds raised an excellent question, and you took time to give a wise answer. Your response was so much better than just saying, "You have to do it because I said so". Now, your ds understands the purpose of that part of his day. Once the purpose is made clear, work has worth. I remember reading once an institution had the goal to teach a group of incarcerated men how to work harder. They had the men move heavy rocks each day, from one pile to another. Then, the next day they moved them back. It was hard work, but it had no purpose. Thankfully this changed when a different manager was hired. Instead, he had the men work together to build wheelchairs for handicapped children in third world countries. They got to meet one of the children they helped build a wheelchair for - anyway, their work had purpose, it had worth, and they took great joy in working hard then, even completing many more wheelchairs than were expected.
Sometimes I think our dc could mistakenly think they were "moving rocks" in their school day, especially in some of the more methodical types of subjects (i.e. math, grammar, etc.), which is just completely not true. Every single box in HOD has purpose. As CM might say, it's twaddle-free.

But if we come across to our dc as "who cares why you're doing it, that doesn't matter, just get it done", they may miss the worth of what they are doing. I often go back to the Introduction of a guide to share the purpose of each box when my dc ask, or even just to motivate them to do their best. It's refreshing to hear you've taken the time to share that with your ds!

I think you will have many productive work days ahead of you with DITHOR now. Thank you so much for sharing this, as it is often in our presentation of homeschooling as mothers that our dc either make that connection about why their work has worth or come to the incorrect conclusion it does not. What a good example here you have given!
In Christ,
Julie