True. On reflection, it's patently obvious that the Less Wrong way to deal with Omelas is not to accept that the child's suffering is necessary to the city's welfare, and dedicate oneself to finding the third alternative. "Some of them understand why," so it's obviously possible to know what the connection is between the child and the city; knowing that, one can seek some other way of providing whatever factor the tormented child provides. That does mean allowing the suffering to go on until you find the solution, though -- if you free the child and ruin Omelas, it's likely too late at that point to achieve the goal of saving both.