If we argue that lethal weapons are justified as a memento mori, it becomes effortless to justify anything at all regardless of the dire consequences. If my grandfather flew a fighter jet, does this mean everyone should be allowed to own one for sentimental reasons? What about my uncle who maintained a Minuteman nuclear missile & warhead? Surely that has great sentimental value and I can therefore justify keeping one in my garage. In short, we have endless ways to remember our loved ones, and we also have horrific gun violence in the USA due to its criminally insane laws. Basic reason (a capacity most people sadly lack) suggests that confusing A with B produces predictably dire outcomes.