Why are knife control laws so strong in the United States as opposed to gun control?

I was realizing it would be nice to have a knife with auto opening for boxes, etc., basically a switch blade or similar, and I found out that they are super illegal in my state (and/or there are length restrictions, or both sides of the blade can’t be sharp, etc), but I can go into a sporting goods store and buy a pistol and ammo in under 30min.

Shooting open an Amazon box seems inefficient. What is up with restrictive knife-control laws??