I do not doubt that hypo to a degree is going to be healthier for the fish, but it is labor and time intensive IMO and there is a higher degree of error to be made than that of copper IME.
How is there a higher degree of error with hypo? If the SG raises too high then ich MAY be able to reproduce. Unlike copper, where if the copper level goes too high then the fish are poisoned to death. I have fish in hypo right now. I top the 15 long off every other day. I check the SG, but not constantly. I drew a line on the tank. When it looks off then I check the SG. This is not labor intensive at all. You top off with fresh as needed. What is the big deal? Hook up an auto top off unit and you don't even have to look at the SG.