But not owning a gun equates to no school shooting :P

And it can’t decide if the handlebar should be in front or behind the cage

I read that as “It’s impossible to do nothing” which I find nice

I might have good news for you, there are people who claim that the effect is not because stupid people overestimate their abilities (and vice versa) but that it is just a statistical artefact. I’m not competent enough to tell if that’s correct, since I didn’t understand the argument completely, but if you want to build your own opinion, you can find many articles about it.