Thanks for the feedback! Great question!
I had that same kind of thought when I added the part about "killing a hero" in there. In my game that inspired it, I had killed a Hero to end a War, which played out as kind of a trolley problem in the fiction. Ultimately killing one person ended a strife between factions that was plaguing my population and drove it up.
Here's what I think I'd say on that: If you're playing through, and you don't think it feels right, go ahead and change it! It might change how the potential miracles balance the game, and you might need to add another potential miracle to re-balance, but that's also why that rule exists.