I'm in a rather good place with cars. I walk everywhere or bike if I need speed (and because I did this when I owned a car, I junked it to stop paying insurance). But, it doesn't bug me when other people drive because it means I pass fewer people on the sidewalk. I don't like feigning smiles at people.
My own unpleasantness aside, the fact is there was a time I needed a car. When i lived with my parents we were way out from town, with two main roads leading in. One was a winding mountain road on which people were idiots; if they were new to it they'd drive down the middle or too fast, etc. Definitely impassable without a car if you expect to live. The other was a highway of sorts with a speed limit of 80 that everyone tended to do 120 on, and some days for whatever quirky societal reason everyone would either absolutely hug the yellow line or drift onto the shoulder. I'd also see a disproportionate number of cars with the left headlight burnt out. Still not sure what that's about. Setting aside the dangers coming from cars themselves, it would've taken me hours to walk and certainly over an hour to bike to work. Hardly worth it when my average shift was 4 hours.
When I moved out, I moved into town. I still drove a lot, but the circumstances changed. Now it wasn't getting me somewhere that I basically couldn't go. It was taking 15 minutes, gas, and insurance to get me to a place I could easily get by walking (when I started, the trip took about an hour; now it's 40 minutes at max) or biking (exact same time taken as driving, due to the nature of the route). Considering I'm the type who needs to walk or bike every day anyway lest I feel like crap, that 30 minute round trip of driving wasn't saved time. It was additional transportation time, since I'd need to go for a walk aside from that anyway. Suddenly the one reason I could see to own a car was gone.
While I could go off on a rant about societal pressures and 'universally' accepted milestones and status symbols (sex, cars, schooling, job, income, etc) the fact is I found something I'm happy with by not owning a car, and maybe in the future that will change. I can certainly say I wouldn't be happy working 40 hours a week and despite living with parents having no cash left over at the end of the month to pay for a car as in my friend's current situation, so I don't.
As for those of you who feel pressured by others to own a car despite not needing one, really the only advice I can give is living well. Have some patience, and these people will be much worse off health-wise than you at age 40, especially if they're the type to drive across a parking lot because walking such a distance is unthinkable.