I agree with you in a lot of ways. I actually find that my many hobbies inform each other in interesting and unexpected ways. There can also be a lack of one-to-one crossover between languages and skills. However, when I wrote this, I really tried to keep the beginner in mind. People will naturally evolve and grow into skills out of interest and necessity, but those folks are already started down a path. I remember feeling so overwhelmed when I was getting going, and this post is really an effort to reduce the anxiety in pushing feet off the starting blocks.