He asks: “Is a lot of this targeted individual time travel tinkering managed by Artificial Intelligence (AI) time travel systems, rather than burdening individual interlopers with unnecessary extra work?” What can Creator tell us?

While the use of time travel is a common occurrence, it is a high-level undertaking because the extraterrestrials understand the complexity and potential for unexpected consequences without very careful monitoring. So this is not done on autopilot, so to speak, by AI alone, but only with AI as an adjunct to deal with some of the mechanical aspects to ensure things are done with high efficiency and dispatch as the project commences and unfolds.