'Get your own funding' doesn't mean you didn't make the grade/cut. Funding is simply hard to come by and many people finance their own PhD study. It is usually the academic offering the place who has been unable to secure funding for the projects they wish to pursue, not the student applying. This doesn't mean the academic is no good either. They may have funded projects in other areas - most academics have far more research questions they want answered than there is funding available for.
Whatever the reason for no funding being available most academics will only accept students who they feel are capable of achieving a PhD - those that aren't present them with too much hard work in the future and with a poor investigation of the questions they want answered.