"Magical ability is the ability to consciously use the so-called unconscious."

[Unbound]

Who said that is a simple task? Of course there is a process to becoming that conscious, but few there are willing or with awareness of it to undertake it. Just because something is possible or available doesn't mean it will in any way be widespread. Consider that the vast majority of the abundance of spiritual/metaphysical knowledge, particularly culturally, has only really emerged in the last century and a half as widely available. I believe there are still plenty of secrets hidden in the world. You may believe that any "true" positively polarized being would share everything openly, but in fact that would be an infringement upon free will to so freely offer the keys to rending the veil. Hence why Ra speaks in such a veiled manner, as an example.