In other words, confine computer use to research and communication in sci-tech alone?
Not bad. It's probably how things should have been, but that boat has sailed long, long back.
Point is, efforts to make decentralisation and independent content creating, hosting and sharing should go on simultaneously with other social steps that you have enumerated. Neither can replace the other.
The actual solution is to invite your neighbor over for dinner.
The actual solution is to volunteer at a retirement home.
The actual solution is to join an amateur sports league.
The actual solution is to take an in-person group class in a subject that you find interesting.