
I think I figured it out
Do you guys remember when krillin harmed Goku with a small stone, or when vegeta couldn’t lift 1000 tons, or anytime dragon ball characters made a fuss about something that even weaker anime characters like luffy can carry? Yeah it turns out gravity in dragon ball is just way too much, the proof is when krillin tricked blue Goku by cutting off a part of the ceiling which Goku barely reacted to (apparently) but in fact gravity just pulled it down so fast even Goku can’t react to it in time, it implies gravity in dragon ball is significantly stronger than ours which explains why roshi destroyed the moon with (idk probably 200 or 300 something but not 139) and an average human is 5, an average human is just way too strong. Let’s not forget how in the anime a bunch of rugby players were stopping imperfect cell.
I wrote this as a joke but it kinda makes sense