Actually, they do have to be so text-based, because that's what they're based on. Saying they don't need to be so "text-based" is like saying
they don't need to concern themselves so much with God. It's fundamental to the religions.
Only some sects of Christianity are wholly text-based. Most Christians accept that the Bible isn't all there is, and that it may not even be
completely correct. Islam is based on the Koran, but also considers the sayings of Muhammad, called the Hadith. Judaism is based on both oral and
written law; the written law is called the Torah.
But yes, each of these religions is founded upon scriptures. That is their basis. It is essential to the religions.
I agree that living a spiritual life doesn't require any scriptures at all. Many devout, pious people never learned how to read, yet live holy
lives. Lack of scripture doesn't necessarily bar you from finding God (or enlightenment, or whatever). Following scripture doesn't necessarily bar
you from finding God, either. It's not so much the path, as the pilgrim, that matters.

