Maybe is because WoS is famous, has nice PR with the people in nostr so anyone who is onboarded to LN grabs the first thing that has at hand, and hapoens to be WoS.

U think that nostr os doing a solent job of orangepilling people hands on by making them have self custody of their nsec key, and once you get use to that is simple to apply it to Bitcoin and start to understand the benefots of being self-soveraign.

In a way is the other way around of how many of us got here, mayve by forst wanting to be self soveraign and then searching for tools to do that