You are simply looking at raw numbers, which is a mistake on your end.

Desktop applications allows for far more complicated features and usecases; both in terms of UI and in terms of available compute, important for laying the groundwork and exploring the possibilities within this new paradigm. The share of power-users is far larger among the early adopters, which also impacts the numbers game you hint to on one end, but on the other hand gets into the fact not every type of user is of equal added value (in every moment in time); power users are what bootstraps this thing for the most part.

Case in point: The Damus Notedeck thing is gearing up to be a mayor breakthrough in within the Nostr space; and Gossip in its own way did it before that.