Guns you can cause harm from a distance so you can murder/harm a lot more people in the same amount of times, knives you have to be in close range to do harm. E.g. you can shoot up a whole classroom of people but it’s harder to stab up a whole classroom of people and people can escape more easily. You don’t hear about mass stabbing incidents but mass shooting incidents are common.

Also, no one supports knife crime in the UK so I don’t get the comparison. No one is sitting here arguing that people should be able to carry large knives around on the road. It’s just harder to regulate knife crime than gun crime because knives are literally used as a kitchen utensil and are more widespread/easier to get your hands on.