Is university always the best option for getting a good job?

It depends on the university. In many cases it's not the education you receive or the eventual grade of your degree, but who you mean whilst you are there, the contacts you make and the name of the university you went to. If you wish to be an artist, going somewhere like Goldsmiths, The Slade or St. Martins will push you further in your career than going to, say, Derby University. You may come out with a First from Derby but it is unlikely you will have been tutored by famous artists or have well known curators and gallerists visit your degree show. The well known universities also have good links with industry and can place their students in good jobs on leaving.