It was drilled into me since childhood that speaking with your hands is lacking "class". On a conscious level, I know not to judge people by something as superficial, but on subconscious level, if someone is swinging their hands in the air while talking to me: I don't want to talk to them. It's the same with being loud, or using stop words etc.

I haven't been to Italy, but this was a huge deal for me living in Israel. In Israel, it's a substantial cultural divide between descendants of Arab countries refugees and those coming from Europe. It's generally seen as "proper" to not use your hands. In the military, especially in basic training, that would probably send you doing pushups.

I live in the Netherlands for about five years now. To be honest, I didn't notice people talking with their hands... well, outside of the Middle East or North African immigrants. Also, I don't really have Dutch friends to the point that we'd spend enough time together for me to notice how and if they use their hands during a conversation. In more formal context, I don't see the Dutch doing that.