Not really - "arguing over where to draw the line" would be a discussion about how a hypothetical new law should treat model weights; however, assertions about whether they are a derivative work (or even "work" as such, in the sense of copyright law - noncreative transformations aren't copyrightable works, no matter how much "sweat of brow" or money they took) is a discussion about where the old copyright laws have drawn the line, and the "should's" don't matter there, it's about how the courts will interpret the precedent, and at the moment they haven't said that they are derived works, and while they could declare that, there are all kinds of arguments why they also might declare the opposite.
Ideally somewhere between "you're not allowed to take my things" and "you're not allowed to learn from what I tell you".
Not really - "arguing over where to draw the line" would be a discussion about how a hypothetical new law should treat model weights; however, assertions about whether they are a derivative work (or even "work" as such, in the sense of copyright law - noncreative transformations aren't copyrightable works, no matter how much "sweat of brow" or money they took) is a discussion about where the old copyright laws have drawn the line, and the "should's" don't matter there, it's about how the courts will interpret the precedent, and at the moment they haven't said that they are derived works, and while they could declare that, there are all kinds of arguments why they also might declare the opposite.
Imaginary Property Rights don't exist in Nature. A purely man-made construction.
Humans are part of nature, like trees and foxes. Property rights are necessarily part of nature too, by extension.