Of course people can use other people's work, within terms and conditions. The people that build data models are required to follow laws. They are more than welcome to use content within their constraints.
> Of course people can use other people's work, within terms and conditions.
No, actually there are many situations where the terms and conditions can be completely ignored, and people can use other people's works without permission, or without caring about the terms and conditions.
> They are more than welcome to use content within their constraints.
No, they can ignore the constraints, because the law allows people to use other people's works, without getting permission, and without following the constraints of the original creator.
> The people that build data models are required to follow laws
The point is that the law allows people to ignore the wishes of the original creators, and use their creative work, in many situations, while ignoring what the original creators want or has authorized.