I ride as much as is possible considering weather, obligations, and plans.
If I need 20 bags of .5cu of dirt, I drive because otherwise it would be nuts to make 10 trips to get the dirt or to pay for it to be delivered. If its a grocery store trip, I try to ride. If its getting my kids after school and to activities, I drive. If time allows, I(or we) ride.
Jobs(careers) are absolutely available to those who dont drive. No question. I simply find it odd to claim a lack of personal transportation wont limit opportunities. It wont limit opportunities only if you are easily mobile and can uproot where you live. If you wont do that, then you are limiting opportunities. And that isnt a bad thing, its just something that should be acknowledged.