But why should things work differently for "AI"?

One could of course say that "IP" ("intellectual property") is an ill concept all in all and abolish it. But than without exceptions! If it's not a valid concept in regard to "AI" it's not a valid concept in general. But if we want to keep that concept "AI" needs to bend to the same rules that apply to anybody else. Simple as that. Law is universal. (At least it should be like that everybody is equal before the law.)