The SAstras based on Sruti prescribe the ideal which one has to follow. Depending upon one's SraddhA ( faith) , deSa (place), kAla (time) and vartamAna (environment), religious practices are being done . Many a time we find that there is a big gap between what the Scriptures prescribe and what we do in practice.If we are unable to do as per Scriptures, we should feel sorry and offer our apologies to the devatAs(Deities) / Rishis/ pitrus (Manes) in a spirit of devotion and SraddhA.
Changing the Scriptures for the purpose of adaptability is not warranted nor is it permissible.