Botamo is a plot hax character who was actually able to take hits from Goku. The whole fight is a huge stretch of disbelief, but I suppose the important thing to take note of here is that Goku still won in the end. A rematch would end no differently as Goku would be in the driver seat of the match the entire time. There’s just nothing Botamo can do to even make this a close fight as none of his attacks would actually injure a serious Goku. Goku wins.