Honestly, that's just typical Oda yet again!
We have Sabo firing a huge firefist on all Gorosei:
No damage at all.
Yet 0.00000001 HP Kuma punches awakened Saturn once and immediately breaks a limp off of Saturn like that?
So 0.000000000000001 HP Kuma hits harder than fresh current Sabo?
Or a more simple conclusion: It's Inconsistency Piece again and it really proves how powerscaling is practically pure shit... What matters more is still the plot and narrative.