Only when the data in question is so obscure to the point that the original source is the only place in which the data exists; which is neither common, nor useful to regurgitate, in practice.

It’s like if someone asked an artist to draw Trump, and then they did. It’s not that they studied what he looks like, but they’re familiar with that walking pusbag and there’s only the one, so it’s going to be a recognizable drawing.