She's hedging her bets. Keeping extra men in the bank.
Then there are women who like having guy friends without the (overt) pressures of courtship and sex. I've known quite a few women over the years like that.
Driving per se isn't going to go away. Geography conspires against any move to remove the automobile completely. But the urban lifestyle must, by needs, be anti-auto... it's the only way for the urban model to survive into the next few decades.
Those of us who live outside it may continue, though, to enjoy long walks on the beach and long drives through the countryside.