Maybe you have to draw a picture george, and see what a tool does, when it gets caught on the outside of a turning, it goes down george, it makes an arc george, as the tool rest is the fulcrum, and the tool going down will have the end swing away from the wood. Maybe someone can draw a picture for you george, have a nice day george
But, Leo, something you just can't seem to comprehend is that it DOESN'T get caught because it has no wood over it to catch it, save the minimum required to start a shaving; which goes where the turner wants it to go. The motion of the turning wedges left outside, also into air, or wedges right inside into the open area. We can also be even smarter, and take advantage of the flute in the tool instead of the sides. That way the natural curve ( allows most of the sharp catching but easily cutting edges to be forward, not up at all.
The purpose is to prevent a catch so we don't have silly analyses of what happens if you do, Leo.