system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] "The Time and Mind Stones are safe on Earth. They're with the Avengers." Exactly how powerful are the Avengers compared to other forces in the universe? Thanos easily defeated Xandar and Asgard within a few days. Did Thor really think the Avengers would be enough to keep the stones safe?

The last time Thor was with the Avengers was 2015. At that time the roster was Iron Man, Captain America, War Machine, Falcon, Vision (with the Mind Stone), Scarlet Witch, and Hawkeye. In 2017 he learned Doctor Strange held the Time Stone, and he could assume Hulk safely got to Earth via the Bifrost. Did Thor really think this would be enough? When Thor said this Thanos had two Stones and was on his way to get a third. It took less than that to decimate Xandar and Asgard. Did Thor really think the Avengers would be able to fight off Thanos, or was it more of a "They're our last hope for two of these Stones so they'd better be enough"?
gpt
I think this is the usual advantage given to humans in fantasy/sci-fi: creativity and/or dedication.  Also, they're an entity Thanos is unused to dealing with and one he can't predict.  It's not that they're more powerful, it's that they have some traits that may help.

He was right, in the end, while Earth didn't keep the stones safe, creativity and scientific experimentation of humans is what restored the universe, not those other, more technologically and socially advanced groups.