Why should they be required to do that?
The fact of the matter is that all employers discriminate on the basis of their standards for qualification for the job. Do they post all of those so that you can decide if they are "fair". No they don't. And....they are not fair. The discriminate in favor of those that have better education and against those who don't. They discriminate in favor of those that have experience and against those who don't. They discriminate mostly in favor of who will deliver the most bang (do the best job) for the buck (work for the lowest wage.)
Life isn't particularly fair. But it is great fun.
If they are going to discriminate against someone because of their sex, race, or religion. They should be required to divuldge it right on their application, or better yet post it on the front door so other that people won't waste their time applying.
Your policy of overt discrimination is patently dishonest. If it's going to be overt then make it overt. IE. Tell people your not willing to hire Jews, Catholics, women or blacks, for example. You favor a policy by which an employer can hide his or her odious bigotry and ostensibly appear to be an Equal Opportunity employer, because it would cost them customers, while wasting everyone's time in the process.
Furthermore, your advocate allowing discrimination for any reason then defend your point by using educational qualifications as an example, instead of race, sex, religion, or age, attributes that obviously cannot be changed.