Is it because a trained AI is used for profit?

Absolutely. But especially because it skews the market dynamic. Copyright doesn’t exist for moral reasons but financial reasons.

Is that a promise?

Being a 3-dimensional being I was only able to make sense of this by imagining what a 3D puzzle piece would look like.

This is of course a lie to make myself sound clever… it was the buttplug analogy that made it all snap into place for me.