There have been around 40 ish successful Cirrus outcomes including over water, mountains, built up areas, tress etc.
If that's so perhaps therein lies the answer to the OP's question about why there is such an apparently onerous checkout requirement. Could it be a reflection of a perceived (by the insurance market) willingness of Cirrus pilots to push beyond their capabilities, knowing they have the get-out of the BRS, resulting in a disproportionally high frequency of insurance claims?
I wonder if other types with BRS are showing a similar trend.