While, I am not answering the poll since i'm not in the demographic. I am, however, going to state something many people who have been to college have learned but this is also a great thread for people in high school and maybe even middle school to know. The biggest misconception i see when people talk about college is its there to teach you everything you know. At the University that I attend they stand by the quote of, we don't teach you everything you need to know, we teach you how to find out new information and teach yourself.
I don't know of a single University that claims to teach you all the things you know about your career but if they are a good university with a large alumni group and most of which became successful, I've noticed tend to teach more about teaching yourself and showing you how to do so. So to me this poll is almost useless in its original thought (not sure if it was or not just what I've seen come from it), and while you learn a lot on the job you most likely will not learn how to do your own research and your own learning without a college degree. This isn't an absolute statement, but I tend to see that in the place I work, the stage hands that went or are going to college have learned how to learn new things while the people who never had the opportunity or want to go to college struggle to embrace new concepts.
I think by your statement that you did miss the point of the poll. Since the poll is rightly biased to professionals who have earned their degree (with the option for those who did not), there is not a contradiction to your point. I would have to somewhat disagree with your university in as much as I feel that High School is your opportunity to "learn how to learn" and college is a place to give you the "building blocks to a career". College doesn't teach you how to do a job, then I worry greatly for the medical community. No, they can't teach you everything, but this is why people seek more advanced degrees, to continue their education.
The problem with much of American education these days is that it continues to be dumbed down. With ever increasing class sizes, professors cannot teach but instead offer facts that can only be tested through multiple choice exams since they could not grade that number of essays. I would say that I had relatively few courses that required me to think about the subject matter while a majority were there to just regurgitate the information. How many students cram before an exam, just to pass the test? Do you think that this is learning how to teach yourself? What a good college/university should be doing is giving you the tools to become successful in your career. This is why I think that all the programs centered around design are failing their students. They do not offer them the tools to get out into the workforce. If the schools were training good technicians, it would be run more like a vocational program. Personally, I don't know of another success story from my state college's program (besides an actor/director) and the university I went to at one point would refuse to hire the technicians in the theater program to work in the professional roadhouse due to the lack of real world experience. There's a big difference between corporate theater and educational theater, but we use the same building blocks since physics and other sciences are the same.