I was asking why land and mining are so all-important that minimizing either (or both, is that even possible simultaneously) is the relevant objective function here.
Land use is a cost. Mining is a cost. We minimize overall cost, not one specific thing that has a cost.
I will add that society is clearly happy with using land for that very low payoff activity we call "farming". The $/acre from PV is much higher than that from farming, you know.
I don't get the impression you've thought very clearly about all this.
There is this thing called nature, and not building building on it or in a very dirty way dig gigantic holes into it is preferable.