Pastor Bob, you have made your points eloquently. And, I agree with you. I know that many here don't want to open up a free wheel and try to corral all those tiny balls and it is easy to buy an new one. I like my old SunTours and Shimanos. It is not too hard to do. By the way, I also like Regina Oro's and Atom freewheels, but don't have any in the fleet now.
I think Sheldon Brown advocated for not opening up a freewheel and I see his point. If your pedaling, there is no friction from the freewheel, there is nothing slowing you down, the only time a freewheel will slow you down is when you are coasting. A bike shop would never rebuild a freewheel, but as a hobbyist, I do it.
I like smooth quiet freewheels even if it doesn't really improve my efficiency.