It certainly can help, but is it a must? I don't think it is a guarantee. I think it depends on your line of work. I can have in-depth philosophical conversations with all of my college counterparts (one's that are very well-versed in a wide array of topics, one's that I do consider intelligent). I have gained general knowledge about many topics through research and reading many books. In other words, I responsibly took matters into my own hands because I never really cared for the structure of our schools. I can outwit plenty of college-educated folks (especially theists), because I noticed that even if they are reasonable with most things, they can be unreasonable with other things (I'm in no way implying that people that are not college educated are more intelligent on average, just that it is possible). I'd like think I have done my best without college. I still have taken several of college workshop classes that are structured differently since I found them to be much more useful in my personal pursuit of knowledge. What do you think?