Only 45% of people in the US have access to public transportation.
And just having access to some public transportation doesn’t mean you have useful access. Being able to access a bus stop doesn’t help if it won’t take you where you need to go, or if the time schedule isn’t acceptably close to your needed transportation times.
Problem is that there’s no other alternative for most people. Unless you live in a city, public transportation isn’t a valid option. Most people living in most locations (at least in the US) have to have personal vehicles to attend school/work, shop, and socialize.
Once self driving cars become commonly available, driving will no longer be a requirement and I think that driving licenses should be stricter on who’s allowed to drive.
Honestly I’m hoping Blizzard will release all their other games on steam as well. If they get review bombed and Overwatch does poorly though, it will lower the chance of that happening.