If 1% of people using the tool end up like you, and 99% end up drooling invalids, I think it would be insane to not blame the tool. If a tool that's incompatible with humans isn't to blame for that incompatibility, what is to blame for the harm done? Human nature? The point of a tool is to be used by humans.

Even if a tool can only be used for lobotomizing humans, the usage of the tool is where the main blame should be placed.