Frieza made his wish!!!
Let's say if Frieza would've reached Dende during the time they made the wish to port everyone to earth and instead of Dende wishing everyone back to Earth Frieza beat him to the punch and wished for immortality. Just to keep things on track, let's assume King Ki intervened and found a way to get all of the Namekians on Earth, including everyone else minus Frieza (Goku as well along with Bulma, Vegeta, etc) while Frieza wish took place. Do you think Frieza would've ruled everything with an Iron fist given that he is now immortal or do you think the wish would've been for nothing? How do you view the ending result?
Remember, everyone is back on Earth and is aware of Frieza wish.