Yes but we can't run a simulation of what life would have been like if, say, we'd had monarchies or socialism instead, and technology kept advancing. We can only state what has transpired. If there was no Elon Musk, would someone else have had the vision to build out the super charger network and the gigafactory to have forced electric vehicles into being viable? If the Wright brothers hadn't been the first to fly, would someone else have managed to do the same thing? The first transatlantic telegraph cable failed.