Here you go, idiot: the facts:
Hibor and USD Libor Charts. Since Jan 2019 both exhibited a range of around 40 basis points. Hibor was in no way more volatile. Hibor is traditionally more volatile on higher frequencies because it is a city state not a huge country, 7mln people vs 328mln people. You are a muppet. You asked for facts here are your cold facts.
https://tradingeconomics.com/hong-kong/interbank-rate
https://tradingeconomics.com/united-states/interbank-rate
I d found similar numbers when looking it up a few days ago and probably asked the question already:
Why are interest on idle Hkd positive balances so volatile with IB? It is not reflected in Hibor afaik