I don't think "because there's legitimate uses" is the differentiating factor, since that implies only kitchen knives have them. Self-defense is a legitimate use for owning a gun, for example.

In many countries self-defense is NOT a legitimate use for owning a gun.

Many of these countries have exterminated their large predatory animals.

Guns also have legitimate uses.

iirc the UK does ban kitchen knives from being carried publicly.

It seems the tradition of bringing your own dining knife passes. [https://www.atlasobscura.com/articles/medieval-knives]