[Sephiroth would see no beauty in that which he would seek to destroy, only hatred and blind determination to see it through to it's end. But then he has not ever succeeded in destroying his world, however close he might inform Lancelot that he came.

It does lead to the question of how he would feel about all of what had been, after it was gone. Sephiroth doesn't feel such a sense of loss though, even when he looks into the viewfinders on the 5th Floor. He feels the loss of what was his, what was stolen from him, his legacy. Not the loss for some elusive 'beauty' of the Planet itself.]

Then perhaps when I gain this true power, we shall have this conversation again. Destruction is as necessary as conception.