A lot of tools have safety measures which can't be circumvented by their users (e.g., you have to use both hands to start thems). The reason being that some dangers are easily underestimated, even by experienced users. Manufacturers do indeed much better about the inherent risks of their products than users.

If a knive could be built which allows to cut food, and protects you from cutting off your index finger, wouldn't that be great?