Sure, it’s truism. I just felt like I had to make myself super clear since you kept using car and knife safety as examples.

Your original comment spoke about safety mechanisms in gun construction, not about how carrying, in itself, makes others more unsafe, which is my point here. Along the way you’ve written things I thoroughly don’t agree with, like

A trained person carrying a gun is safer than not.

Take this video of unarmed policemen trained in de-escalation, for instance. Would this situation have been handled more safely if it was handled by gun-trained, armed policemen?