It's because the PS5 has
Blast ProcessingAMD SmartShift.
(yeah, I make that joke all the time, but I reckon there might be something to the system being able to boost the clocks at the drop of a hat)
how would that have anything to do with anything?
the system cannot boost clocks, it is sometimes FORCED to reduce them...
if the PS5 didn't use smart shift it would literally run some games even better than it already does.