I don’t recall this terse last-minute exchange in the standard origin mythos of the Man of Steel:

Lara: I mean, whatever, the whole planet is going to blow up in like five minutes. I can’t see how it would have made any difference.
Jor-El: This is why you’ll never understand ethics.
Lara: Not unless you can explain it in the next five minutes!
Jor-El: It’s pretty simple: you wanted to kill the baby.
Lara: By sucking it out of my womb, and you want to kill the baby by blasting it into space.
Jor-El: Not kill it! Get it off Krypton before the planet explodes.
Lara: Isn’t it your fault that the planet is exploding?
Jor-El: How is that relevant?

Hmm. With such toxic parenting (however brief), it’s no wonder that Superman developed an allergic reaction to the remnants of his home planet. In fact, based on this, I wonder if his vulnerability to kryptonite isn’t really psychosomatic — a suppressed-memory reaction to Jor-El’s and Lara’s post-natal negative vibes…