There r rituals in AD&D! What u don't think sacrificing animals to gods, demons, devils, weddings, atonements, exorcisings, etc. r not rituals? These r just high level components of the game. Just bc u don't see them in your campaigns don't mean they don't exist within the game. Creating Holy water, blessing holy symbols, and the like is no different than a blacksmith, weapon maker, and fletcher making bows, and the like. They don't need to have a spell to make them unless they r magical items. Holy symbols r not magical items like that. They just need to b blessed by a god through a Cleric/Paladin.