Leo Strauss sketches an answer in his "How to Begin to Study Medieval Philosophy" in The Rebirth of Classical Political Rationalism, ed. T. L. Pangle, University of Chicago Press, 1989, pp. 221-222, bolding added:
Sed Contra, says Roger Bacon:
For the Jew and the Moslem, religion is primarily not, as it is for the Christian, a faith formulated in dogmas, but a law, a code of divine origin. Accordingly, the religious science, the sacra doctrina, is not dogmatic theology, theologia revelata, but the science of the law, halaka or fiqh. The science of the law, thus understood has much less in common with philosophy than has dogmatic theology. Hence the status of philosophy is, as a matter of principle, much more precarious in the Islamic-Jewish world than it is in the Christian world. No one could become a competent Christian theologian without having studied at least a substantial part of philosophy; philosophy was an integral part of the officially authorized and even required training. On the other hand, one could become an absolutely competent halakist or faqih without having the slightest knowledge of philosophy. This fundamental difference doubtless explains the possibility of the later complete collapse of philosophical studies in the Islamic world, a collapse which has no parallel in the West in spite of Luther.
God has revealed philosophy to His saints to whom also he gave the Law. He did so because philosophy was indispensable for the understanding, the promulgation, the adoption, and the defense of the Law. It was for this reason that it was delivered in all its details in the Hebrew Language ... to the patriarchs and the prophets. They possessed wisdom in its entirety before the infidel sages obtained it. ... All their information about heavenly bodies, about the secrets of nature and the superior sciences, about religions, God, Christianity, the beauties of virtue ... were derived from God's saints. ... Adam, Solomon, and the others testified to the truth of the faith not only in Sacred Scripture, but also in books of philosophy long before there were any philosophers so-called. (Opus Tertium, x and xxiv, trans. S. Hirsch in A. G. Little, Roger Bacon Commemorative Essays [Oxford, 1914], 137).