That's rubbish! A degree doesn't necessarily have to show your knowledge in one field. A degree also has the purpose of showing you are capable of learning and disciplining yourself to learn to a certain level of education.
Unless you are doing a vocational type of degree (doctor/nurse/midwife etc) or going into a specific field, I have found that most of your education starts when you start your career. It’s the same with learning to fly or drive, once you've passed those exams and you're on your own that is when the learning starts!
I believe that 50% of the experience of going to University is to grow up, have fun, goto social clubs, carry out team sports and meet new people. As has been said many times before, I find many of my answers to interview questions come from my experience at Uni.
By all means make sure you go to Uni for the right reasons but don't skip it and regret not going later.