A single EV recharging uses about as much power as a house. Power demand at night is very low. Brownouts and rolling blackouts occur during peak demand in the day. Unless nearly all households in California have EVs charging it will not cause the same levels of daytime power demand that cause brownouts. Hybrids have all the complexity of a battery electric car plus all the complexity of a gasoline engined car plus components to put them together.
Electrics are a proven and simpler solution.
Brownouts and rotating blackouts happen during times of PEAK demand, which is the middle of the day. Electric power generation in California is some of the cleanest in America. That gasoline car also outputs more pollution as it gets older. Electrics are the best technical solution. But, I welcome hybrids or any genuine effort to measurably improve air quality in our cities.