There's 10 houses on my street, if every house had 2 cars and each drove 50 miles a day at 3 miles per kWh, and the cars are parked 10 hours overnight, that's 3kW per house

As we can all boil a kettle (3kW), or have a shower (10kW), or cook a sunday roast (5kW), and indeed do those at the same time, it's not a problem.

All of them? The typical car is moved less than 100km per day and is parked upwards of twenty hours a day. With a kilowatt or two you car charge the car.