"Thousands of tired, nerve-shaken, over-civilized people are beginning to find out that going to the mountain is going home; that wildness is necessity; that mountain parks and reservations are useful not only as fountains of timber and irrigating rivers, but as fountains of life."
That's the reasoning behind it. That's the reason for the National Forest and Park Systems. That's why Teddy did what he did.
Also, 68 out of 200 million acres that's every 7 out of 20 acres of land is being used for s*** like this.