I'm sure there are very many cute girls working at grocers shops all over the world, and you will never see any of them, no matter what game mode they choose to play.
By all means, try to force all into open - end result, you still will not see the vast majority.
You just don't get my point, do you? It is not about if i see the majority. It's about to see everyone that is playing the game at the same time as i am. Of course I will not be able to stop others from doing what they do when i am logged out. But i would be able to stop everyone while i am logged in.
If you invade a country in the morning and the people there stay in bed- surely they can not do anything against the invasion. If they stand up after the invader is gone, surely it might be too late. But if they act against every invader while they are out of bed, they can make a change.