Imagine how different the world was for people with super niche interests before the internet. Back then, this would have been seen as the weird (or at best eccentric) guy in your town who collects fire alarms and won’t stop talking about them. Now he’s presumably got a fulfilling social life via his unusual hobby, and an outlet to share his thoughts to a willing audience.
For all its many faults over the last decades, this is the pure internet at its best.