I agree with WWW.
I done really well at school getting 8 Standard Grades (GSCEs) and going on to get 5 Highers and 3 Advanced Highers however when I left school no one would even touch me because I had no experience. It showed me how unimportant high school grades were in the real world, apart from when you're applying for University.
I then went on to do a University degree, but again I don't plan on getting a job with it, it's only for a backup career if things go wrong.