Can't outgross a nurse.

British upland grazing has been continuous for 6,000+ years. We have archaeological evidence of pastoral farming on the same hills that graze cattle and sheep today. For six millennia, those hills have had large herbivores eating grass and depositing nutrients. The ecosystem evolved with this. The soil biome depends on it. The plant diversity requires it. "But cattle are destroying the environment!" Which environment? The one that's been grazed for 6,000 years and is still producing food, or the one you imagine should exist based on watching David Attenborough? Nature isn't static. These hills aren't "pristine wilderness." They're managed ecosystems that have supported human populations for 60 centuries. Remove the cattle and you're not restoring anything. You're creating novel conditions the ecosystem hasn't experienced in recorded history. But hey, at least you'll feel morally superior while importing soy from deforested Brazil.