Allegory doesn't forgive everything. And riddle me this: if Kevin was so guilt-wracked, why was he content to go on living in his little Crater's Paradise with a recreation of his dead wife and why was he willing to torture Troi to the brink of madness to cover up his crime?
When this episode first aired, I thought it was brilliant--even more "The Measure of a Man." But I think MEG--whom I have disagreed with mightily in the past--is onto something here. It's one thing to suspend disbelief, another to suspend the very moral sense the episode is appealing to.