My take is that time-travel cannot exist (except perhaps as a tour through a read-only-memory of the past or a sim-city of the past with non-player-characters).
You cannot actually change the past, but only play out scenarios. Because if you could change the past, nothing could ever in fact get done (since some doofus would just come along and change it so why bother doing anything).
(since some doofus would just come along and change it so why bother doing anything)
LOL! Interesting take.