Mental gymnastics but you're still wrong. Sorry.
https://www.quora.com/Was-Goku-parti...ed-by-Superman
Superman was also not the very last Kryptonian, but both Goku and Clark Kent were assumed to be the very last until others showed up. And hey guess what? Zod and Raditz/Vegeta/Nappa happened to both be badguys! How strange. Almost like Toriyama borrowed heavily from Superman or something.
Toriyama outright admits he lifted heavily from Superman, so any further argument is pointless. Dragon Ball and Dragon Ball Z are both heavily inspired by the legend of the Monkey King and Superman. Goku's origin story is 1:1 Superman's. An evil force (Brainiac/Zod/whoever happens to be truly behind Krypton's destruction in any given canon:Freeza) destroys Superman:Goku's home planet, they're raised as a human but are actually a super powerful alien with extraordinary powers from another planet.
You seem to be very defensive over the fact your precious Kakarotcarrotcake was directly inspired/double dipped from a western source. I can only hope you learn to cope with this.