Someone needs to own a car still.

And that someone can’t be available every day when I need to do two school runs and an office trip.

That someone can’t always be available when the sink springs a leak and I need to go buy some new washers and plumber’s mait.

I really question your life experience at this point. If you’re single, childless and living in a big city, sure, cars are very unnecessary. For most people this isn’t the case