Cars are a solution for somewhere north of 90% of trips in places designed for Americans.
I'm not saying that I love it; as a family of four, we average about 6K miles on one of our cars and 3K on the other per year. I'd be hard pressed to cut that usage in half without significant sacrifice and it would be practically impossible to cut it to 25% or less. Winter skiing alone is probably 2.5K of those miles (10 trips @ 250 miles R/T) and there's not a practical substitute to get from here to there for a weekend of the kids' skiing.
But many places have been designed explicitly against humans (frequently against the "wrong kind" of humans).