I used to wade into the bevel debate with my battle flag flying and sword swinging. Fact remains, it doesn't matter a lick. Draw knives fall into two categories, one where the handles are parallel to the flat of the blade and one where they are not. And even that does not matter, because everyone can shift their grip on the handles to accommodate the tool to being bevel up or bevel down.
What matters is TOOL CONTROL. Do you have enough strength in your hands, fore arms, shoulders, and back to control the tool while exercising enough force to do the job?
Secondly, a nick in the blade is not going to gouge deeper into the stave than the rest of the blade. You would need something projecting out from the blade to do that. If you leave a mark on the stave, it will be a raised bit of wood that can easily be removed with a lite lick of a scraper tool.
Now, for the debate on sharp versus dull, I am a commissioned officer in the ranks of the sharper is better army!