In killing the Shado-Pan prior to us ending the Sha threat, you're right, you wouldn't kill off dozens of kids for sport, you'd kill off MILLIONS.
And even if you're just eradicating the Shado-Pan AFTER the Sha, what of the other dangers of Pandaria? The Mantid?
By god, you're a monster.
Are you the next expansions final boss?
At this point we've stopped discussing the actual lore and have moved on to just trade insults. Closing.