I have to disagree here. While I'll grant that people need to be safe with their powertools, the simple fact is that not everyone is. There is also that fact that someone could easily make a mistake, or get kickback or any one of a thousand other little things that could go wrong that could end up with life-changing consequences. I don't see adding an additional layer of safety as a bad thing. If nothing else, a couple MM deep cut and the $100 to replace the brake/blade will get the attention of most "weekend carpenters".
By your logic, they should go back to plate glass in cars, take out the seatbelts, stop making anti-lock breaks and disable all the airbags. Let's get rid of the safety on guns, ban barrel locks and outlaw double-action triggers while we're at it.