How do guns stop a lorry mounting the pavement? They don't.
Even if they did, why would we trade these very infrequent attacks for daily misery? How many school massacres is it going to take before you realise that safety and freedom are two ends of the same balance.
It's much harder to be an accidental fatality in a gang knife fight. Things are safer when there aren't 8g chunks of supersonic lead flying around.
There's still as much gun crime in the US as there is —even where there are regulations— because there are still guns. In direct circulation or coming in from other states. Criminals tend to not care too much about restrictions. If they want a gun and can steal a gun, they can have a gun.
Gun control works elsewhere because we do it nationally and then get rid of all* the guns. It takes decades and insanely strong punishments. We still have criminals, we still have knives and acid and lorries and explosive precursors. All nasty stuff, but a power of magnitude when it comes to general safety of the rest of us.
* Most guns anyway. I have a shotgun but you can have rifles and there are a very, very few handgun exceptions for the right people. With all of these, there are restrictions on things like barrel length and magazine size on all guns and even more restrictions on types of ammo, and how much you can own. Not to mention the interview and home office check you get before you're allowed anything.
>Most guns anyway. I have a shotgun but you can have rifles
I would argue that rifles are more a tool for hunting than a shotgun. Germany wanted to ban shotguns (trench guns) the allies used in WWI because of their devastating effects.
Shotguns are also a good tool for hunting birds and whatnot. There are many places in the US where people hunt for cheap food.
Pistols aren't ideal for any kind of hunting though. They're almost exclusively for self defense (and the majority of guns used in homicides).
Even if they did, why would we trade these very infrequent attacks for daily misery? How many school massacres is it going to take before you realise that safety and freedom are two ends of the same balance.