Do you live in the suburbs? This could become true, but more because of the increasing urbanization trend making public transit more attractive than cars in more places.
We haven't exactly spelled out the terms precisely, but the spirit of the wager is that self-driving cars will be involved somehow. Certainly public transit could be part of a mix of transportation options, but I wouldn't win if self-driving cars don't come to fruition yet she doesn't get a driving license because she can subsist entirely on public transit.