I think this is needless semantics to avoid the nub* of the matter tbhChoice involves discrimination. Discriminate means to evaluate choices so that you can select the appropriate one - the same as when you discriminate between all your choices of ebikes before you select the one you want.
When you say that you select the best prospective employee, what's best? is it the one with the highest capability to do the job, the highest qualifications to do the job or the one that's likely to do the job best? There's so many things to consider. Will they fit in with existing employees or will they be a disruptive influence? How much time are they likely to take off and can you tolerate it? How flexible are they likely to be with their hours when you know that you need a certain amount of flexibility. Whilst their sex doesn't necessarily affect any of these, it might indirectly.
You know the difference between choice and discrimination really. And the point over what defines "best" is pure distraction technique (can't fault your application though
Choice is choosing the high quality candidate over the useless one. Discrimination is choosing the black candidate over the white one when all else is equal (or indeed the other way round)
*my predictive text insists on this being "hub" I wonder why ?!