I can imagine a lawsuit from the opposite side of the argument: it is these APIs that allow to challenge incumbent social networks, and if the result of the lawsuit rules these APIs out, growing a competitor to Facebook or Twitter might be a lot harder.

Recently I've felt the benefit of this, when sharing my Twitter following with Clubhouse. Clubhouse can grow and challenge other networks because these APIs exist. (We can argue about the degree to which sharing your data should be allowed, but setting an overly restrictive precedent is a real possibility)