My morose answer to the "Why" question above is: For now, in this Epoch, we are the randomly fortunate Domain, Kingdom, Phylum, Class, Order, Family, Genus and Species to evolve via Darwinian Evolution to the planet's top predator with the unique attendant technological ability to change the planet to suit our wellbeing. Considering the probabilities, it would seem that "God really does, (did in our case), play dice". IMO, our form of complex life can only win the "Lottery" once, and we are the lucky winners.