I'm not sure in the context of irem, you actually "choose" your future, as in you stand there and decide what will your future be. I interpreted it that even though you, the player, chose which option to pick, your character does not, and instead destiny or intuition guides him to what has been their future regardless. In this case, the kind of guy to go into this corridor and see this vision is the guy that will have this future, even if it's not what they would choose if they could.