I think it's a bit more nuanced than this -- even within the "name-brand" national parks, like Yosemite or Yellowstone, the sacrificed part has the hotels and o

I think it's a bit more nuanced than this -- even within the "name-brand" national parks, like Yosemite or Yellowstone, the sacrificed part has the hotels and other facilities that cater to humans, but there's still a ton of land that is actually preserved and is ecologically significant. E.g. 90% of Yosemite is preserved wilderness with much more limited access to humans than in the valley (cf. https://en.wikipedia.org/wiki/Yosemite_National_Park#National_Park_Service https://en.wikipedia.org/wiki/Yosemite_National_Park#Nationa...).