Goku wants one thing for the whole world. He just wants peace, he wants everyone to get along with each other. So when [he] encounters a villain or a bad guy, all he's trying to do is change the way they think a little bit and shift them towards good. So if in the middle of a fight if a bad guy says, "You know what? I changed my mind, I'm going to be a good guy now," he's going to stop fighting. He's not in it to beat him up to a pulp or prove that he's better or stronger.