Change My Mind

Pretty much both

Anime:

Goku isn't a hero. Toei didn't listen to Akira Toriyama and screwed it up. They kinda listend in Super

Manga:

Akira Toriyama can do what the heck he wants and so he did. In the manga there are hints in the things Goku says that show that he isn't doing this to save everyone. For example, in DBZ manga Goku rushes out of the hospital on Kinto'un to get to Capsule Corp. for his ship to Namek. Yajirobe comments on how Goku seemed exited about a chance to fight Vegeta again, despite being completely outmatched. That's only one example. There are many more in the manga trhat suggest that Goku doesn't care about the earth. He does care about his friends, don't get that confused, he just sometimes gets carried away with the need to fight.

You’re wrong

Well, the A.I has a point. Basically, Akira Toriyama wanted Goku to be different to the other Shounen Jump heroes. He wanted Goku to protect earth only because he'd get to fight a strong opponent, meaning he'd cause a lot of trouble by stirring up mischief and putting earth in great danger so he could fight, which is in his Saiyan nature. When he hit his head as a child he basically lost his nature, so to speak. Unfortunately for earth, as Goku grew into an adult it came back to him and was probably brought out with the help of Vegeta. Toei Animation screwed it up and made it so that Goku was a hero. In Dragon Ball Super though, Toei decided to listen to Akira Toriyama and made Goku how he's supposed to be. For example, Goku reminded Zen-Oh about the Tournament Of Power which put all the universes at great risk of death ( one in twelve, probably less because of the mortal level as well as the Grand Priest's favorites ). There are more examples, though.

OK, so Goku did that so his son could unlock his true potential. He had this plan going since he chose not to re-enter the hyperbolic time chamber.

Way to dumb it down, simp

Yea but Goku most of the time is just looking for someone strong to battle with and when any villain tries to take over he usually rushes to battle to defeat them for the protection of the world

Are you talking about the manga or anime?