Do all undergraduate architecture students want to become professional architects?

For decades the B.S. in architecture has been assumed to be the first part of a 4+2, in other words the pre-requisite degree for a professional Master of Architecture degree. But do all students pursuing such degrees intend to become licensed professionals? Would it not be better for both the profession and the built environment, if the degree could be understood as disciplinary rather than pre-professional and as such, better integrated with the university at large, and a truly interdisciplinary, liberal education?