Why does Super Saiyan 4 make Goku an adult?

[Six Trails]

Serious answers are preferred to shitposts like "t0ei nonsense".

I don't recall an explanation ever being presented in the anime or GT Perfect Files for why SS4 reverts Goku to his adult body. I've seen some say "SS4's power overpowers the wish from the Black Star Dragon Balls" but I find that to be a weird explanation. It makes it sound like Goku could just train and become strong enough in his base form to override the wish. What do you all think?

:mikey

 

[Future Warrior]

Having a physique be at it's peak would probably be one of the essentials in reaching the objective of attaining the absolute limit of power that is SSJ4.

 

[Captain Cadaver]

Meta answer - Bringing back mature, adult Goku whilst also being able to switch to immature Kid Goku.

In-Universe answer - Future Warrior already covered it. Would be hard to contain what's essentially Oozaru stacked on his SSJ forms in a child's body when he needed his tail regrown just to handle SS3.

 

[withheldforprivacy]

So that he can fuck Chichi.

 

[Let's Go Fearless!]

I thought SS4 breaking the wish was the reason for a fact.