I think that's likely true for social media apps where the product is "free" in that users are the product and advertisers are the customers that fund it. In that business model, your number one goal is to maximize eyeballs.

But Haven doesn't have that business model at all, so it's not clear to me that a way to control who sees what posts would harm success.

By analogy, farmers want to grow as many plants per acre as they possibly can to maximize revenue. The idea of potting their plants individually makes no sense. But if I just want a plant on my windowsill and don't want dirt everywhere, a pot is what I want.