Common Ground or Private Park: Whose Nature (writing) is it anyway?

From the blurb on my copy of H is for Hawk it was pretty clear that the book was about Helen Macdonald and Goshawks and TH White and grief. I didn’t mistake the book for the Observer Book of Goshawks and feel outraged by all the snot and tears.
I read it and loved it. Only then, did I discover that there are, apparently, very strict rules, about how Nature Writing should be done…