Well, I guess in the end, Rivkat and MS loved Mulder and Scully too much to leave them unhappy. I know exactly what you mean. All I can tell you is it's redeemed--they're redeemed--by the love they share for their child, and the sacrifices they're both willing to make for her sake. What's the lyric by Leonard Cohen?

Ring the bells that still can ring
Forget your perfect offering
There is a crack, a crack in everything
That's how the light gets in

I am always drawn in by stories about redemption--and that's what Iolokus is ultimately about.