I'm learning the game GO. I see that after the players have made a lot of moves, at the end of the game, there are several visible territories for black and for white. But I don't understand, why does the game stop there. For instance, I think that if white plays inside black's territory, black will be forced to play inside to capture it and when doing this, he will place his own stones in his territory, which makes his territory count lower.
What prevents them from playing inside the opponent's territory?