Is the gun more at fault than it's user? No? Then why the
constant criticism of an object? Why not argue the merits
of methods of reasoning or the lack of ethics? Lets
emphasize education and training instead.

Because that would place the blame squarely where it belongs and those people
don't want to admit their (society's) shortcomings, nor do they have a clue to
deal with it. Much easier to demonize an inanimate object and obfuscate the
real issues.
Greg Sefton