Hobbies are how we express ourselves, not only by what we do when we do our hobbies, but also in the types of people we choose to be around, such as other enthusiasts. So when someone like Ramit Sethi says that we should feel free to spend money on our hobbies, I totally agree with him. I don't believe I would be able to live without my hobbies, it would feel like a hollow existence. I also think having many hobbies makes it easier for me to relate to others, as there is a higher chance of having some sort of common interest. So, do feel free to spend money on your hobbies, and use them to their full advantage to express yourself, and to experience what it is to be human through them.