Interesting concept. I have one counter example that may be a different category. I leave sharp edges in natural edge pieces both hollow forms and bowls. I have done hundreds of natural edge hollow forms with the sharp edge. Many with no bark. The don't crack. After they dry I ease the sharp edge with 400 grit so they won't cut flesh. I try to avoid other sharp edges for esthetics and safety. The rims of bowls can cut badly! So my bowls drying for return have no sharp edges. It would seem logical that a bowl turned with a sharp edge has tiny cracks in that edge when it comes off the lathe and some might lead to bigger cracks. Softening the edge would cut this e tiny cracks away. I know rounding over the edge of the base on end grain hollow forms helps keep them from cracking.