This is a nice idea, unfortunately it’s not generally realistic. It’s very ivory-tower idealistic.
Between rational people like you and I- yes I agree, violence is a failure. But not everybody is rational.
The fact is there ARE people in society who would harm their fellow humans, either for fun or for profit or because they just don’t know any better. I wish that wasn’t the case, but it is.
Ignoring this fact does not prevent such people from harming others, or protect those victims. And saying we should remove the means of self-defense because violence is failure is like saying we should remove airbags and seatbelts from cars because crashes are failures. Sure crashes and violence are failures, but sometimes failures happen and you are either prepared for the consequences or you’re not.
The other issue is that ‘remove guns entirely’ is simply not possible. You can disarm the law-abiding, but that will NOT disarm the criminals and those with no respect for the law. If you feel the law will prevent them from obtaining guns, then please explain why an anti-gun law will be any more effective than anti-drug laws (which we’ve been trying at for 30+ years, with little or no success).