The presence of all that material up there is essential to life on Earth (via the tides).

Its surface features are not: in fact you would need massive megastructures for people down here to even notice any change to those features.

Absolutelly, lets not remove the Moon when we get to the point of being capable of doing so, but that’s an entirelly different level of preservation than making the whole thing be preserved according to the same rules as national parks.