Over a period of time divergent Hindu practices have emerged which are difficult to follow and practise. The difficulty is three fold a) In case of mantras , the recitation need be proper else these could lead to adverse effect. b) Vedanta studies presumes a basic qualification with involves purity,dispassion etc. Without these a person is not eligible to take up Vedantic studies c) The customs are difficult to learn and practice without error. In case of Shirdi Sai worship, Baba accepts all devotees irrespective of level of purity and then transforms them over a period. To be a Sai devotee thus only devotion is necessary The practices are not rigid and each devotee can flexibly worship Sai. It does not involve any mantras etc.