Exactly this. It is not even correct to define cheat because it is an operation that does not change the game dynamics. ET mode already allowed this way out in case of failure and they never intervened. Not being a multiplayer competition HxC is absolutely right, there is no harm to other players if someone does ALT-F4. So the problem does not impact on the gaming experience of others but at most on your own, where you will be aware that you have not been honest with yourself.