Everyone seems to be obsessed with something

So recently I noticed that every single one of my friends has an obsession for something. For example one of them knows everything about cars, the other one all about mountain bikes and literally my whole country is obsessed with football. But I don’t. I have hobbies of course. For example, I love mountainbiking but when I do it with a group of friends, they start talking about things I’ve never even heard of and they kind of expect me to know this stuff too. And even though I love doing my hobbies and I don’t care about details and thia stuff. Well I wanted to ask if it only seems like everyone has that kind of obsession except for me, or if that’s actually true.