I agree, Michael,
I recently turned a large set of plates,side plates, bowls, Etc. for personal domestic use. I found the first couple plates were not quite what I wanted, and were too different from each other (although realistically the difference was small) for my liking. By plate number three & four the muscle memory had set and I was away. The result is consistent size, pattern, form, and an incredible increase in the speed at which each item is turned.
Not being a batch turner as a rule, these lessons were very useful, and, of course, transfer to everything you do. So your "turn three and make two and three from good wood" is a great idea for a system.
One of the older members in my club used to make a lot of Windsor chairs and always claimed he turned six legs for every chair...and then chose the best four...and further more, that he wasn't after machine-turned accuracy and consistency because you cannot look properly at four legs all at once, so slight differences were tolerable...
I should add that he is/was such a fine turner that you couldn't tell his legs apart anyway, so maybe it was all bluff for the newcomers 🙂