Those hobbies are popular, anon, so I assume they don't judge each other for those things. In fact, that's probably a good way to make friends. The problem with you is that you're actually childish, which is why you're obsessed with being "adult." The point is that as long as your life isn't a mess, you can have whatever hobbies you like. I'm a literal oil worker that likes to make clothing and collect shoes (not sneakers). People find it interesting when you're a well-rounded individual. Collecting things, even trivial consumerist shit can be enjoyable, and you should enjoy yourself if you can. Stop being a Bitter Betty.