In a lottery there is one person who won and many more who lost. I can talk to the person or people in either group, congratulating or commiserating as appropriate. If I go to a meeting attended only by the lottery winner, however, and talk to that person, I know the likelihood of me talking to the lottery winner is 100%. Congratulations will be the appropriate response to that person.
If a lottery was a valid analogy for existence the way you are trying to use it there would be one self who exists and selves who don't and I could talk to the ones who don't and commiserate with them. I can't because the draw has already taken place and I can only talk to the winner. The likelihood of the person I can talk to being a winner is 100%.