Think Of The 10's, 100's, 1000's Of Lives That Could Be Saved. Why?

I was just watching a program on the Science channel. They were talking about the possiblity, and the practicality of time travel.  At the end one of the scientists said that one use for a time machine would be that we could use it for forwarning about potential disasters. Then he said, "think of the thousands of lives that could be saved."
My immediate reaction is, Why?  Why would we want to save those lives? What's the point? It's their time to go home, to die. I understand it seems cold and unfeeling. I understand that many, most, maybe all readers would say Yeah, sure, until it's your life then you'd change your mind.  But no actually I'd take exactly the same position about my own life. 
The concept of being born to live a life and then to die, ceasing to exist and dropping into a black hole, is pure unadulterated stupidity.  We humans, and for that matter all forms of life, recognized or not, from mineral, if that's in fact the lowest form, I don't know, are energy plain and simple. Energy can't be destroyed, at least that's what they taught me at Buena Park High School. It can be renewed, reconfigured, whatever, but not destroyed. Meaning that reincarnation is a fact, there I said it, a fact. I believe that not one of us dies, ie goes home, until our sentence in this world, self imposed or otherwise, has been served.  You CAN NOT die before your time, is that plain enough. 
Many philosophies and philosophers, have said that prior to birth we all lay out a game plan, consisting of the famous 5 - who, what, why, where, and when. Who you are, meaning parents, relatives, friends, enemies, are all pre-planned. What you are, good/bad, student/dropout, job/profession, crooked/honest, rich/poor, jock/nerd, types of activites, etc., are all pre-planned. Why you are, planned or accident, that's all that comes to mind, are pre-planned. Where you are, could possibly be where in time as well as space, born in the US, Europe, any civilized part of the world, or pick any third world hell hole, which isn't to say that can't be found in the US or Europe if that's your plan, or that you couldn't rise to the top in that hell hole. It's all pre-planned. Then we come to when, which I believe can be anytime. Literally any time in the past or future, can become your present, if that's what you plan.
Of course we all like to believe that we have free will, and pre-distination is a lot of crap, and maybe we do. I believe that free will is a fact, that our lives are laid out prior to our birth and we have free will during life to make decisions that may alter our lives but never to the point that we move outside the plan.
Back to the topic, NOBODY dies before their time.  So to save those thousands of lives that the scientist was talking about is 1 impossible, 2 if possible throws the whole system out of wack. We can all, everyone of us, look back and remember something that happened to us and should have killed us.  But it didn't, because it wasn't supposed to, it wasn't our time.  Maybe we were sick, or hurt, in the hospital, whatever, or maybe we walked away without a scratch, that was the plan.
Most if not all of the philosophies and philosophers teach that the reason we come here again and again is to learn, what I don't have a clue, but something.  Others say its punishment or reward, others say we're enraptured by the sensations of the flesh. Who knows really, it could be any, all, or none. Why isn't important anyway, to us, at least right now. What IS important is there's no reason to fear death, first because we can't die before it's time, second because we don't cease to exist when we do, period.

Lee Murray