Leo pretty much nailed it. Whether a turning needs to have drying slowed or not very much depends on the wood species, thickness, shape, and defects in the surface. For me, using kraft paper, bag/sheets/etc to slow drying and reduce loss is a very easy process to increase yield of projects I have put significant time into - harvest, cut blanks, mount and cut on the lathe. I may never learn the finer points of how to be more successful without using a “slower drying method”, and I accept that for now. When I fully retire and have more time this may be an area of experimentation to learn more.
Another crucial factor is local climate -- e.g., drying conditions in the Southwest require entirely different methods than the Gulf Coast or New England.