For those who spend USD200K a year to become DMP, that is equivalent to flying about nine JFK-HKG round trips in full F fare. These people will not need additional perks for thmeselves (they are in F and there is no more op-up at F), but for their families only.
Of course they are very special to CX. (UA's GS and AA's CK are a lot easier. Many CX DMs can easily be in an equivalent category already.)