Why Sarah instead of..
Look, I like this movie and I think it's really well made, has great 1980s feel and atmosphere to it, etc.
However, when you think about the motivations and behaviour of people, not much makes sense.
Why did Kyle Reese only protect Sarah?
What I mean is, why is Sarah's son so important, but no one else's is? Couldn't Kyle have changed this? It's not Sarah-SPECIFIC stuff that's important, it's a very 'anyone can know this' stuff. What Sarah teaches her son, could've been taught by Kyle to 100 or 200 people, easily.
Heck, instead of tough warrior, they probably should've sent some writer nerd to the past, to craft manuals, schematics, plans, maps and all the other information they know about Skynet, the machines, factories, areas of importance, and so on.
Then teach this information to 100 or 200 people and teach them to prepare, so when Skynet happens, they can immediately nullify it or at least instead of "one man, who taught us to fight", there will be 2000 people that can immediately react to the situation and 'smash the mfkrs' and whatnot.
I mean, why leave it to such a late time anyway, and just passively wait for 'future to happen' and then ONE MAN can teach how to 'turn it around and bring us back from the brink' AFTER being almost annihilated completely?
There's _SO_ much Kyle could've done to protect the future, instead of the narrow-minded goal of preserving things that already happened. He could've created an enhanced future, where everyone immediately knows exactly how to defeat Skynet before it escalates to a full war.
Heck, they could've eliminated Skynet in the first place, before it's even conceived, which was touched a bit in the deleted scenes and the childish 'sequel' (that should never have happened).
What I mean is, when you go down the logical path, you have to realize there are better things to do than 'protect Sarah'. What's one dead Sarah compared to the future being not only saved, but improved upon? She would die anyway at some point, better to die in a glorious fight against a terminator.
The logical path I mean..
1) The reason Kyle protects Sarah, is that Sarah will give information to her son, who will give information to a lot of people, which will end up saving the future.
2) Since INFORMATION is what's the important thing here - to ENSURE the information will be given (by Sarah to John, then by John to others), why not just expand upon that, and ALREADY give the information to as many people as possible, not just 'make sure Sarah gives it to John'?
3) This would mean holding seminars and lectures, writing books, drawing schematics and such, so when the whole Skynet thing happens, a big group of people (and future people know who the survivors are, so the right people will get the info - also, it doesn't even matter if wrong people get the info, too, everyone should have it) is just as prepared as John or Sarah would be.
4) Why would Sarah even HAVE the information to give? Because of Kyle. Without Kyle, Sarah couldn't prepare, hide, or know about the war, or know anything to tell John, etc. So if Kyle can ensure ONE MAN can have that much that useful information, wouldn't it be more logical to expand upon this and have AS MANY PEOPLE know this as possible?
I realize there's the whole 'credibility problem', and the only reason Sarah was convinced, because of what she saw with her own eyes and all (although at one point, Kyle seems to have convinced her without further evidence).
That's easily solved by just taking all those 100 or 200 people to witness the terminator machine - it's not going to disappear anywhere, and it will go wherever Sarah goes, so it can be easily always found.
Wherever things would go from there, is up to anyone's imagination, but my point is, Kyle is being VERY inefficient and illogical, and so is John - instead of just saving 1 woman so 1 man can teach something in the already-bleak future (which is, for some reason, acceptable to everyone?? why?), they should try to optimize and expand this mission as much as possible. Why let something awful happen in an awful way (the brink), when you have the power to prevent it? Just so you, as Kyle, can get laid?