As for car use, where I live which is in a quiet rural coastal area so without a car I'd be severely limited. Bus service between local villages is OK but anywhere else no so a car for my needs is pretty much essential.
We shouldn't compare today's car use to today's post-Beeching train services and post-privatisation Thatcher-deregulated mess of bus routes, which consist of commercial routes cherry-picking the most profitable areas, distorted by trying to hoover up bus pass users and "front-running" competitors, and subsidised routes decided by a council cabinet member, usually from elsewhere in the county, on the advice of an understaffed council "department" (often just part of one officer).
What we need to try to imagine is how today's car use compares to the public transport service we would have if so many people weren't conned into doing extra unpaid driving work every day. I was in outer London this week (travelled there by train) and I looked up how to get from my hotel in one suburban centre to a venue a few miles away and the app (Öffi, which works in many countries but strangely not reliably in West Norfolk) said there were buses about every 7 or 8 minutes. Then I noticed I hadn't set the departure time and that was at 11.30pm! In the morning peak, I wouldn't have to wait more than 5 minutes for the next bus and most often about 3... as it happened, a bus left the stop as I walked out of the nearby shopping centre, but the next suitable one arrived as I reached the stop. That is how buses should work. Not the irregular-spaced 8am-5.30pm hourly-ish same-number-but-varying-route rubbish we suffer in the regions.
We can get some idea by looking at a fair country that uses a mix of buses, trams and trains to give most people reasonable options for most journeys, whether or not they can drive. Something a bit like London but even better. Like certain European areas, mostly centred on cities.
Then maybe courts would more often disqualify road ragers like the one in the opening post, judges would not let so many drivers get away with pleadng "exceptional hardship" when they accumulate 12 penalty points, and government wouldn't be driving so many healthcare staff into their graves by providing no useful public transport at most shift changes at most NHS sites!