I guess you disagree with my argument above, that Jor-El isn't really controlling what happens, then?

I see it as the show set it up as Clark being brought back in return for the life force of another, and Lana was the original choice there. While Jonathon did have heart problems, for all we know he may have still lived for years longer. Yet he dies on the same day that Lana is returned to Clark. I think that is directly down to Jor-El

And also, as far as Clark knew, it could easily have been someone like Chloe or Martha whose life is lost. He did take a big chance in asking for Lana's life to be reversed, when Jor-El is there to warn him about balance and basically straight out saying that if you save Lana, someone else you love has to die in her place. That's when I think Clark should have stopped. I guess I'm mostly arguing over the difference between trying to help save someone, and reversing time to change the fate of someone who was already dead, when you know that will put other people at risk