Sometimes heartbreak can even override a person's attachment to their children. Yes, Padme had a good reason to keep living, but she was at the end of her rope, and everyone has one. I don't feel anyone should ever judge another person when it comes to how much they can take. Walk in another person's shoes, and all that. And sure, Leia was strong in most instances, but one can never say how she would have handled the same circumstances Padme had to deal with.