I've lived on a one-way street for over a decade now. Pre-COVID, it was unusual to go a week without seeing someone going the wrong way. It was not unusual to see this multiple times in a day.
I also bike down a two-way separated bike lane to/from work. It's separated by concrete barriers, except at intersections. I'd come across drivers trying to drive down them, again, roughly weekly.
It's predictable that I'll see a car turn the wrong way onto a one-way street, and I've learned to anticipate it, but it's not accepted.
Most drivers are okay, but there's a small number who are really bad. If you come across a hundred drivers a day, you're going to come across bad ones pretty often.
The author didn't say every driver sucked -- just that he regularly comes across drivers who suck. I'm willing to bet that most road users will assert the same experience.
Most drivers pass safely, and several times a week, one won't. Most drivers stop at red lights, and every week or so, one won't. Most drivers check their mirrors before turning, and every few hundred, one won't. Most drivers use their turn signals and...actually, that last one might be a lie.