Three pointless movies.
I heartily disagree! While I agree that the first of the three was the best, the second one was quite good, and had the nice twist where the "heartless evil" robot became good. The inital scene with Sarah meeting the T-Arnold was excellent.
The series had been based on the idea of non-determinism, that the future is not pre-determined, is mutable and changeable, and it is yours to choose.
Perhaps you read/heard something from the writers and/or directors about what they felt the idea was, but if you are basing this on your personal interpretation, I'm sorry but you couldn't be more wrong.
The whole premise (even in the first one) was that the future was immutable. It ends with Sarah Conner going off to the desert to await the "Final End". The idea of "...being able to pick your own father..." - absoultely not - if John Conner had sent any one else but the guy his Mom told him about then he wouldn't exist. Sarah's attempts to destroy Skynet before it came to life failed - they were destined to fail.
The only counterpoint in the moive plot against my idea is the comment that "they delayed the birth of Skynet", that the date told to Sarah was wrong - but that could be explained away by an off screen act where John tells his future-Dad to tell Sarah the wrong date because that was what Jonh had always been told.
The lack of choice extends to the Terminator character - the robot had no free will whatsoever. There are examples of reluctant heroes- - here's the pre-programmed hero. No choice it makes is outside the bounds of it's programming. It's not being heroic, it's being "controlled". It doesn't take the bullets or face the "villian" out of a sense of what is right or wrong. Even the bit at the end of T3 where John is yelling at the virused T-Arnold - that wasn't choice, that was a command.
This movie actually has strong resonance to my belief/understanding of
Freewill/Predestination.
John Conner still has to make day to day choices and very often has no idea what the outcome will be - even though other people, future people, already know how his life ends.