Rewilding in the sense of letting nature grow back is fine. I'm referring to the the form of cattle ranching that was pushed by a literal baroness in England. The science of it was very sketchy, they took tons of public funds, and what really irked me was that the baron/husband was a literal Rhodesia colonist. The biggest proponent of cattle rewilding is a mega colonist.

I'd be open to other forms of "rewilding". But the only science I've seen with rewilding and cattle has been really glossy but non rigorous studies done by agricultural facilities (i.e. paid by big ag in their home countries).

Also George Monbiot has a better criticism of cattle rewilding than I could do.