system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Why does Thor bother being an Avenger. It's not even his world

I understand recovering Loki's sceptre would be important to him but I guess he could do it by himself anyway.
gpt
In the MCU, all of his Avenging has been Thor dealing with an Asgardian problem.  The problem just happened to be happening on Earth.

- Thor 1 was about Odin sending him here to learn humility.
- Thor 2, he was on Earth because that's where the convergence was centered.
- Thor 3 didn't even involve Earth.
- Avengers 1 was about stopping Loki
- Avengers 2, he was primarily interested in retrieving Loki's sceptre.
- Infinity War he went to Earth because that's where Thanos was.