What's stopping you from doing those things after university?
You'll get a job. A 2:1 is really good and especially from Oxford! That's amazing within itself!
Knowledge is power. Perhaps that is the one thing that they don't have. You can go on to learn to drive, get married, have kids, and what not, just like everyone else. If you really want it, you'll get it. You must know that already.
Personally, if I had to choose between the common lifestyle of marriage and a child, and a 2:1 degree from Oxford - I know what I'd choose...
(I'd rather be in your position)