Even if this is just a small detail. But Goku spares Frieza's life in Dragon Ball's Namek Saga has a lot of influence on the later plot.

Dragon Ball fans have debated for a long time whether Goku should spares to Frieza while on Planet Namek. It's essentially the anime equivalent of debating whether Batman should kill the Joker. After everything the galactic tyrant had done and would likely go on to do, the universe might have been a better place if Goku had just put a permanent end to him when he had the chance. Then why did the creator of Dragon Ball let Goku spare Frieza's life? Let's find out the reason with KataMoon Blog

What will be the effect of killing Frieza?

Goku's goals changed throughout his conflict with Frieza. At first, he was just looking to test his strength against another powerful opponent. But when Goku realizes the threat from Frieza, the fight turns into a battle to protect friends and loved ones on Earth. After Krillin's death, Goku unleashes his wrath on Frieza.

By the end of the fight, Goku had effectively accomplished all of these things. From testing his own strength to protecting the earth. Therefore, defeating Frieza will only bring more trouble It can be said that Frieza's other armies will find Goku for revenge. Not to mention Frieza's father is King Cold, can also attack the earth to avenge his son. So it's not completely coincidental that Goku forgave Frieza

Goku and Frieza at the present time

At now, Goku will more than likely find the strength to beat him whenever the time comes for them to fight again. Additionally, it's been made clear that if Frieza makes a direct threat to the Earth's safety, Goku is more than willing to send him back to Hell.

Not only that, for author Akira, the fact that Goku spared Frieza also proves two things. The character Goku will always stay true to the original goal, It is competing against strong opponents as well as protecting everyone. Besides that, Goku character still retains moral values ​​to set an example for young fans when watching this Saga.

Conclusion

Goku spares Frieza's life not just the safety of the earth in Dragon Ball, but the author still keeps the original value of the character Son Goku. Besides that, this will make Dragon Ball fans not too bored with this manga. Because of the battle between Goku and Frieza, it was considered by fans to be the longest battle in the anime world. So it doesn't make sense to continue fighting Frieza and King Cold on earth.