I think people underestimate how difficult it is to teach yourself, especially when there are so many different ways to learn and a million different paths to take. One of the most important parts of bootcamps, in my mind, is that all of the curriculum is there, in the right order, and on a set schedule. When I taught myself to program I probably spent 80% of my time finding the right resources and understanding what I should be learning and 20% of my time learning. I think it takes a pretty special person to self-teach when you don't know what you don't know.