Valve doesn’t want to make a buy to play game unless it’s something that pushes the medium forward somehow, which is the only reason Alyx was made. A PvP moba can be a source of continued revenue like all the other games they still support (and one they don’t).
That’s the best part! Which is why it’s weird the game is bloated with other systems and minigames that pull you away from what shoulb be the core of it: diving.