We have a Violence Problem!

Yes, it's theoretically possible, but the risk for the stabber is much higher because s/he has to be within punching range of someone to stab them. Also, stab wounds are less likely to be fatal in most cases. Ultimately, there's no way to compare stabbing and shooting. The plain facts are that mass shootings are much more common than mass stabbings and are universally more fatal. Imagine what would have happened if Stephen Paddock had tried using a knife instead of multiple AR-platform rifles with large capacity magazines in Las Vegas. If Mateen had only a knife the chances of him being able to kill 53 and critically injure 49 more would have been zero. Several of the people he killed he shot through a closed door. Knives don't work through doors. It's likely had he only been armed with a knife that someone would have brained him with a bottle or chair very early in the attack. So, just to be clear, there's no equivalency between knives and guns, and bringing up knives is a red herring meant only to distract and detour the conversation in irrelevant directions.