pcgameshardware tested msi's latency killer feature with ryzen 98003xd and found out the actual performance is worse when latency killer is enabled manually.

so what amd explained in the reddit thread is 100% correct that aida64's result may not be able to reflect reality.
to me it seems amd is not happy with what mobo vendors came up with, the latency reduction function. however from what i have seen no mobo vendors auto enable that special function by default so i think it is fine.

please note that msi does warn you by adding the description of "may potentially reduce cpu performance" at the beginning.