You are still wrong, you have assigned the bullet as the killer, That bullet would still be nestled neatly in the chamber if THE KILLER had not operated the gun/trigger. A tool, no hammer no house. Using your line of reckoning, I have a fail safe way to end all deaths caused by drunken drivers. End production of gasoline! No gas no vehicle moving fast enough to harm anyone, a drunk can only push a car so fast.I do absolutely agree with you that truth carries more weight by far.
Think of this arguement tho. "Guns don't kill people. People kill people." It is an absolutely true statement. The NRA has rallied behind it. Nowhere in that message does it mention the bullet was the actual killer, or the fact that without the gun or bullet it may not have happend. Truth is different to different folks.
Its perspective that gets shaped. We can always choose a new perspective based on new information. If that new truth is more valid than our past truth (actually our past personal history) says, then perspective shifts.