No job after uni is guaranteed. If you want to do it, go for it - but dont do any degree thinking you can get a guaranteed job straight afterwards because thats the case in the economy just now. The market may change in four years, I know that first hand - everything was hunky dory when i started uni and then BOOM credit crunch! Suddenly no jobs and no job prospects :~P
You've got to just go do something you'll enjoy, or you'll regret it later - job or no job.