I shouldn't need to explain this but why not, Ive nothing better to do.
Humans invented laws for societal purposes. Natural law isn't a thing in terms of how we all understand law. But it can be used as a descriptive term to describe the realities of life and the way the world works. That's just two words overlapping.
What you can't do is sue people because natural law. This shows an insanely bad understanding of what law is and why it exists to help hold societies together and function well.
But then again I wouldn't really expect an academic to understand anything about the real world.