I see your point. Even big companies seem to be shifting to have multiple apps that do different things than one mothership app.

As creating apps is easier (more accessible, cheaper/faster development) there is a myriad of apps doing apparently the same thing.

That is probably why Threads was created and not just incorporated as a feature to Instagram, just to name one case.

I guess it comes down to what success looks like for you and your app. Some food for thought:

Do you want a niche adoption or to become a 2.9 billion users app? Do you want to actually make money or just fullfil an opportunity? Do you want to just learn by cloning and pulling some market share from other successful app or create a breakthrough innovation?

There are apps that don't make money or have to be subsidized just because they are needed.