I would love to hear your thoughts on this:
What I mean is: You do what you can within your means and within the reasonable timeframes given to you by the course, and not necessarily carry the complete burden of their success on your shoulders. In my opinion it's the responsibility of everyone -- parents, peers, the community, teachers, administrators, and whoever else -- to teach, and foster the learning environment in such a way that maximizes the chance of success to the younger citizens of this world. If you view the responsibility as being shared between all, the pressure naturally significantly decreases as you know you directly can't be blamed if things don't work out for your students. It's a complex system.
At the simplest level, don't people attend school to assist them in being successful in life? Assist them in growing and developing into whatever they want to be? If that's so, and being that teachers are the most important parts of the school environment (other than the students themselves), isn't one of the teacher's primary jobs to assist in this success? Because teachers spend so much time with students, they naturally have tremendous (though varying degrees of) influence. If a teacher is lazy, naturally students will be encouraged to be lazy. If a teacher acts like it's OK to cheat, naturally students will be more likely to think it's OK to cheat.
There are bigger questions at hand than the direct and concrete subject matter of an individual university course, and in a lot of cases I believe these questions are just as important, if not more important. Most importantly, keeping these larger questions in mind assist students in staying properly focused and motivated, and thus increasing chance of achievement.
So yes, I do believe you should do what you can to bring success to your students.