The end goal here is that people who live in big cities give up their personal car. The journey there might involve this problem though and it depends on the city to enforce new rules.

For example, my home town Hamburg (in Germany) is a bad example of too few parking spaces being policed correctly. At some point, the drivers give up searching for a free space that's still in a walkable distance from their destination and will park illegally, which leads to one of 2 lanes being permanently blocked by resting traffic. Apparently the police doesn't care about these illegally parked cars.

There are lots of cheaper and more space-efficient alternatives for personal transport, which were mentioned in the article.

It's also possible to rent shared cars for the rare case you actually need a car (if you want to transport large furniture for example).

Speaking from my anecdotal experience, not owning a personal car works pretty well, I commute to work with an electric bike in 20 minutes (which is actually quicker than taking the train or driving a car and then look for a parking space). If I want to buy furniture and I can't transport it with my bike, I can still rent a car.

On top of not having the dreadful experience of having to search 10-20 minutes for a parking space every time, it's also a lot cheaper.