It seems with any app, there is an incentive to keep people on the app, which incentivizes selling hope, not an actual solution. This is the problem with pretty much all dating apps, and I can only assume they extend to friend apps as well.
The goal for these apps then becomes, how do we give people enough hope that they don't quit the app out of frustration and hopelessness, without making it good enough to lose them as a user from succeeding at the stated goal of the app.
The marketing of Hinge played with this idea a bit, "the app designed to be deleted"... but of course, Hinge is now owned by The Match Group, who owns most of the dating apps, so it's not designed to be deleted, at least not anymore, it's designed to sell hope.