He literally says he doesn't want to come back because he feels Earth is safer without him, and that for him it's not that bad because he gets to keep his body and meet great people, but that he's still sorry. You can certainly say "Well he's clearly LYING, his ONLY reason is to have fun in the other world and that whole bullshit about wanting to keep the Earth safe is excuses!" but by that point you're getting into headcanon area.
And you can say "Well Goku never even called!" and you're right, because he DOESN'T care that much. He cares, that's the whole thing I'm deffending, but deep down he's still a goofy kid and like >>184652962
said he's just not like that, like us, he's a literal fucking alien. Thing is his family UNDERSTANDS that. Chi-Chi, for all her complaining, loves him regardless of it and knows how he is. It's expected the reader does too. You can hate him for how he is but oh well.