The risk, of course, is that they'll screw something up and the tormentors will continue to torment. These are generally socially awkward people we're talking about. You're being rather silly to suggest that someone who isn't at home in social situations to begin with and has been ostracized for pretty much their entire life is not at risk of real failure in a social environment.
I'm glad that you were successful in your social ladder climb. But you are pretending that _everyone_ will be successful. It's simply not a foregone conclusion - there are losers in this game, even among those who try their hardest not to be.
> you realize that nobody is any more at risk than anybody else
This is so very false that I don't even know where to begin. Are you saying that there are not real advantages and disadvantages in social situations? Can you not see that the captain of the football team is way less likely to be harassed than the math dweeb?