Kid Goku’s power level is not 10!!
before you bring up the daizenshuu, those numbers aren’t written by Akira Toriyama and just flat out wrong a lot of times.
i based this theory off of both real life and a statement about king Vegeta.
in real life average adults are like 30 times stronger than a baby and I reckon the difference would be greater for a Saiyan. let’s say 50 times.
an infant Kakarot had a power level of 2 making him the weakest of the Saiyans. multiplied by 50 makes his eventual power level of a grown up Kakarot with no training or zenkais a flat 100 (Roshi who was the strongest human had a power level of 139 so he would woop Kakarot)
Saiyans do rely on the Great Ape transformation for a 10x boost to change the tide. so as an Oozaru Kakarot might have been able to conquer Earth (which is fitting knowing how Saiyans conquer planets).
now what about kid Goku? kid Vegeta surpassed his father whose power level was over 10K (maybe 15K). so I think the difference between a kid and a grown Saiyan is not that big. around 20% making kid Goku/Kakarot have a power level of like 80 at the start of the series.