Indeed, but that doesn´t mean that you will always be depending on others. In this respect(and only this one, don´t get me wrong, brains are infinitely more complex than cars or computers), its just like fixing a car or a computer: maybe you don´t know how to do it alone at first, and people can help you a lot. Once you know how to do it, you need to take responsability about keeping it functioning well since its just like your car or your computer. And over time, all those things that appeared as huge unsurmountable problems, will be a lot smaller to the future you who knows how to deal with stuff. However, sharing our problems with a friend or professional always help us feel contained as we learn how to cope with it.