I agree, and I think this should not be underestimated: people who don't believe in public transportation often (usually?) don't use them.
I have never owned a car, I used public transportation my whole life. Trains, buses, publicly-available bikes/scooters, whatever. Occasionally I rent a car. And I am fine, I have just learned to organize around the public transport. Instead of being free to leave or arrive "whenever I want", I know exactly the time (so I'm usually not 20 minutes late because I had a train, where car owners are easily stuck in traffic or left 20 minutes late).
Yes, many times it is longer. But I learned to use the time I spend in public transportation: I read, I listen to podcasts, I work. When a car owner loses 2h30 in traffic, I work for 4h in my train. They lost 2h30, I... well if I can count those 4h as work, I didn't lose anything. I find that even reading is a better use of my time than driving.
But all my life, car owners around me (friends/family) have had trouble understanding that I am fine with public transportation. "Wait, take my car, it will be much longer by train!" or "Do you want me (to drive 30min) to come pick you up so that you don't have to come by bus (which takes 45min)?".
Sometimes it's longer, sometimes it's more annoying, sometimes it's more expensive. Many times it's better, too. It's just different, I just learned the public transportation way. The fact, though, is that it's better for the planet.