The reason that Kyle Reese did not have to go back in time to save Sarah Connor

Rating: Null/10 (21 July 2017)

After having watched the "Terminator" franchise in its entirety over the past week, I have come to a realization.
In "The Terminator" (1984) the "Resistance" led by John Connor, having already won the war in the original (and most definitive) timeline, needed not send Kyle Reese back in time to save Sarah Connor from the T-800 that was sent to kill her. John Connor had already been born, and the war had already been won.
This is how I see "The Terminator" (1984) playing out if The T-800 had been sent back in time by Skynet to kill Sarah, and Kyle Reese had not been sent back in time by John Connor to protect Sarah.
-Sarah Connor was already carrying the child of Stan Morsky which would later become John Connor.
-The T-800 would have gone on its killing spree looking for Sarah Connor, capturing the attention of the news media, and prompting Sarah to seek police protection.
-The police would have arrived at the Tech Noir club sooner and picked up Sarah before the T-800 arrived because the police would not have been stalled due to Kyle Reese's presence in the area. (He was being looked for as well because of his assault on police in the beginning of the movie).
-The Police would have taken Sarah into protective custody.
-The T-800's search would have been stalled.
-Eventually Sarah Connor would have been moved to a military compound after police see that the killer, (The T-800) had not been apprehended or found.
-The T-800 would find Sarah's mother's address after having killed Ginger and Matt in Sarah's apartment.
-The T-800 would kill Sara's mother and "copy" her.
-Sarah would eventually call her "mother" from the military compound with her whereabouts with the T-800 intercepting the information.
-The T-800 would stock up on weapons at gun stores and kill the clerks, further drawing the attention of law enforcement and military personnel.
-The T-800 would storm the military compound with the police in hot pursuit as well as the military, the navy , and the coast guard having been alerted of it's presence in the vicinity of the compound.
-The military personnel would shoot the T-800 down with rifles. The T-800 would continue to advance.
-Seeing that their bullets had little effect on him, they would begin shooting him with grenade launchers, and anti-tank missiles decimating him.
-Bits and pieces of the T-800's cpu chips and the electrical components that constitute the T-800 were found, studied and duplicated preserving the Skynet foundational elements (These elements were already inevitable in the "Terminator universe however.)
-Skynet, judgement day, and the war against the machines commences.
-John Connor and the resistance defeats Skynet in 2029.
-Movie over.