Sure, you don't need CS for a lot of ordinary day-to-day programming, but one day your lack of contextual understanding means you'll reinvent the wheel badly and cause problems. You benefit from having some sense of the bigger picture, and often the easiest way to acquire that is through courses designed by people who know what you don't know you don't know. I think saying programmers don't need higher education is like saying politicians don't need to study philosophy: sure, you can get the job done in ordinary circumstances, but you won't be aware how blinkered your view is by a lack of context, and how this limits your ability to understand what you're seeing and imagine better solutions.