We already have games almost entirely like this, and the market is clear: no one plays them, to a good approximation. People play games to compete or cooperate on specific goals. This idea of sandbox multi-player interaction is only a gimmick that's interesting a few weeks tops, then the vast majority leave to play Candy Crush or Fortnite where they have clear goals.

If they want to meet with friends and hang around, real life contact just can't be beat. That's the reason why virtual persistent worlds are ultimately bullshit (as opposed to game worlds where you have an actual game to play, be that chess or matching colored gems or killing other players).