Way to encourage lying in our hobby!What would stop a non-breeder from housing a supposedly spayed female desert with another male BP, assuming they could not breed? Now you have a female at risk due to her genetics AND due to an unprepared owner.
The question about rendering the female desert unable to procreate comes from the repeatedly observed physical dangers inherent in that gene (i.e. slugging out, binding, etc.). It has nothing to do with the OP thinking he/she is more capable of breeding the females that someone else. Many people already consider desert females "worthless" due to their breeding difficulties.