In the uni, profs conduct the lectures, profs are expensive to
hire, and despite most of them pretending to like being asked
questions and solving students' problems, they'd all rather do more
research, squeeze their own grad students, generate more papers and
studies and make a bigger name for themselves ... you won't get
tenure being a popular prof with the students, you get tenure by
churning out earth shattering studies eh ....
tutorials are usually conducted by grad students, and sometimes,
senior year students like moi .... cos they are a lot cheaper and
you can squeeze out a lot of work out of them for a pittance ....

for polys and JCs they did it another way ... instead of hiring
doctorates they get mostly masters holders .... and squeeze them to
do both jobs anyways ... 