I think we can’t know why each person who does this does this, but I suspect the most common reason is there isn’t a critical mass of active users who post about diverse topics yet.

Are there all kinds of topics on Nostr, not just Bitcoin and developing? Yeah, sure. Are many of those actually thriving with multiple, thought-provoking, inspiring, educational posts and conversations each day? Not yet. This is different from what legacy social media still offers.

If Nostr is a small frontier town, it’s also one still focused on its “gold rush” origins. The people who are also bakers and barbers and launderers and artisans, etc. are usually also prospectors, or at least willing to accept that this is a community which would not exist without prospecting, and prospecting dominates most town conversation. As it grows further, I think we’ll see a deeper culture develop with more independent discussion.