Akira Toriyama's last anime

[Nori]

Because that part is true. However later in the Saiyan Saga, Goku is far stronger then Gohan without Kaioken.

Because.. Final Form Frieza (1%) is still far stronger then 2nd and third form Frieza that nobody else could touch. Goku fights Frieza in two stages. Final Form, and Final Form 100%. In Frieza's final form Goku was able to compete against him. That's all I said, that's all I will say. I never said he was strong enough to take on Frieza's full power.

Vegeta, after Dende healing him, I can assure could beat 2nd form Frieza.