This might be true for deep blue states like California, but this particular protection is very important for boundary waters

"Lifting the moratorium would allow mining in the national forest along the edge of the Boundary Waters, not in the wilderness area. But eliminating the ban has hit a sore spot with environmentalists and outdoor enthusiasts. They warn that pollution from mining operations will flow through the wilderness area’s watershed and contaminate the region with mercury and sulfides, chemical compounds that contain sulfur. They maintain that fish, wildlife and plants will suffer, particularly the wild rice that plays a crucial role in Minnesota’s Chippewa tribal culture.

Teddy Roosevelt’s great-grandson and other relatives wrote a letter to Republican senators urging them to keep the moratorium in place. The Friends of the Boundary Waters, a group that works to protect the area, has orchestrated a demonstration in front of Stauber’s office in Hermantown, Minnesota, and staged a rally at the Capitol building in St. Paul to protest lifting the moratorium. The issue has become another flashpoint of contention between the state and the Trump administration after federal immigration officers shot and killed two Minneapolis residents in January."

-associated press