It is not realistic to power current developed societies using only solar and wind power. For simple reason - we can't store energy well.
Stop throwing up and shooting down strawmen. Nuclear energy was never going to replace all energy sources. Only the worst ones, like coal and gas power plants.
Storing energy is a straw man as well. The most realistic scenarios of renewable grids rely on overgeneration and opportunistic consumption. This will continue to be the case as long as storage costs significantly continue to exceed extra generation capacity costs.
