Earlier quoted context omitted.
Can you name one game, electronic or otherwise, that doesn't involve "beating" something, whether it's the other player, the rules, or even just random chance (dice rolls)? I honestly can't think of any. If there are no goals (and goals imply obstacles to be overcome in pursuit of them) then you've got a toy, not a game.
You said yourself, Cities Skylines
Suppose it's a game: Cities Skylines is open-ended and has no formal win condition, but you can certainly lose. Your city can go bankrupt, etc.
You're playing against the simulator algorithms. If you succeed then you've beaten those algorithms.