Also, California struggles to get new desalination plants through environmental approval. And most industrial processes need continuous power, not just power whenever the weather looks good.
Solar installs are growing faster than electric car purchases. (roughly 30% YoY vs 20%)
People just make up statistics in their head supporting their position. Go look for the statistics for vehicle purchases and PV installs.
PV installs are outpacing anyone's previous estimation by a significant margin.
Solar only makes energy while the sun is shining. Most people want to charge their electric cars at night, unless their employer has a charging station ready for them to use at work. (Many employers have a small number of charging stations for this purpose, but none of them that I'm aware of have enough charging stations for everyone.)
China is doing it.