I don't think it's insane at all, you raise a good point. There's a lot of H2O out there and it's a lot less energy to get it from ~the asteroid belt to Earth o

I don't think it's insane at all, you raise a good point. There's a lot of H2O out there and it's a lot less energy to get it from ~the asteroid belt to Earth orbit than from Earth ground to orbit. Obviously we're not there yet from a technology or logistics standpoint, but I'm sure it's in humanity's future.