I have owned a car before, and I did not use those other transportation methods any less. We don't own a car anymore because it does not make economic sense for us.
When we need to travel by car inside the city, we just use Uber (~30 EUR/month is what we currently pay). When we need a car for a couple of hours to pick up stuff, we use one of the car sharing vendors. We can get "the right car" for whatever we need for ~4 hours with gas for less than ~20 EUR (~once every two months). When we want to travel around with a car, we just rent a high end one for the weekend for ~300 EUR. We do that once every two months, although in the summer a bit more often. This means we end up paying ~3000-3500 EUR/year in rentals/uber.
If we were to own a high end car, we would at least have to pay 30.000 EUR/year for a used one with 100k kms. On top, we need to pay insurance (~500-600EUR/year), parking (~150EUR/month where we live), maintenance (~200/year), handle some other burdens (wheel changes, etc.), and if for whatever reason we need a different car (to pick up something big), we still need to rent that. That puts the costs of owning a car at 2300-2400EUR/year + unforeseen maintenance + gas + rentals + (30.000 EUR - reselling value) / (years until re-selling).
Where we live, unless one uses the car at least every weekend, it makes no sense owning one. At one weekend usage per month, you can just rent, and are more flexible.
I occasionally drive a 20 year old Opel that was purchased 7 years ago for €2500. It works great. I ride my bike most of the time, but it's really handy to have a car to haul kids or heavy/bulky stuff.
€30k is enough for pretty much any new entry level or basic trim car outside of Audi/BMW/Porsche.
But it also depends on how and where you live and work specifically. If I lived in a many of the areas outside of the Périphérique in Paris, not owning a car would probably impact your overall quality of life, but I'd still not want to take it into the city.
We use public transit and bicycles (lots of parents have cargo bikes for transporting little kids e.g. https://www.babboe.de/lastenraeder/big).
Anyway, could you also elaborate on your parking situation? Is this mostly destination parking? I'm just a bit surprised, since a resident parking permit is like €20 for two years here in berlin [0].
[0] https://service.berlin.de/dienstleistung/121721/ (german)
In japan you even have vending machines to pay for your restaurant food inside the restaurant, where your usually paying upfront. And some parking lots have per stall locks that don't let you drive away until you pay. You could argue that is symbolic of lower "trust".
For stuff outside, they just don't have problems with vandalism and theft the way America does, so it makes it much more feasible to have lots of vending machines outside: no one is going to deface them or break into them.
This is also really useful for bicycling. Bikes in Japan all seem to have little locks on the back which go through the rear wheel's spokes, so someone can't just hop on and pedal away. But there's nothing stopping someone from picking the bike up and carrying it away, putting it on a truck, etc. But theft is almost nonexistent in Japan, so people just leave their bike parked on the sidewalk and don't worry about it, and this makes biking very easy and feasible, whereas in the US you have to worry about someone stealing it if it isn't U-locked to something completely immovable, and even then someone might steal parts off of it.
In general people are less reticent to bring a foldable bike in the subway for instance.