I wonder how much this should be in licenses we can use for software, writing, art, since people don't agree whether copyright is relevant when including someth

I wonder how much this should be in licenses we can use for software, writing, art, since people don't agree whether copyright is relevant when including something in a training dataset. And how much chaos and schisms this could cause, between people wanting to allow their work to be part of training sets, and people wanting to disallow this.