system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU/Dr.Strange] In the film, the sling rings are said to allow travel through the multiverse, yet all we see Strange do is travel to different parts of Earth. Why not use them to open a portal to a timeline without Thanos?

So I found it weird that it is mentioned the sling rings could allow the user to traverse through multiverses, but Strange merely uses it as a teleporter within the current universe, going from point A to B.

Why not use the rings to their full potential and go to a different timeline altogether? Certain threats and outcome could've been avoided that way, no?
gpt
The "multiverse" in _Doctor Strange_ isn't the "alternate timelines" kind that's common in sci-fi, where there are lots of universes that are basically the same but with slightly different histories. The alternate dimensions that Doctor Strange has access to are ones like the Mirror Dimension, the Dark Dimension, and the Dimension Where Everything Is Just Hands.