But the purpose of Hindu or Buddhist rituals are not primarily to instruct how they are to be performed. Neither are the celebration of Eucharist or (Hasidic) Shacharit (outside Shabat).
Instead of the cerebral and analytic activity you expect of religious practice, they are participatory, contemplative, illuminative and unitive activities. Focus is not on information, on a preacher or on the leader of a ritual, but on an inner reality however perceived (commonly God, but this does not apply on Buddhism, and among polytheists deity is perceived as manifold).
Your expectations seem to conform pretty well to some forms of Protestant religion, but not to other expressions of religion. Even after this narrowing down, your description of religion doesn't apply to all Protestants – the Quakers do not preach, instruct or even do rituals. Quaker meetings are silent.
Earth is a planet with more than 7 000 000 000 human beings living on it. Most do NOT practice a Presbyterian or Revivalist form of religion. Please, do not expect Anglicans, Neo-Pagans, Roman Catholics, Buddhists, Eastern orthodox Christians, Hasidic Jews, Thelemites, Hindus, Sufi Moslems, Sikhs or Zoroastrians (in no particular order) to conform to a Revivalist/Mainline Protestant or Reform/Conservative Jewish pattern of behaviour.