DUH - guess what - the total history of the church and its sacraments does depend upon how the church supports its sacraments via scripture - the core of the church's understanding.  What you state is not only inaccurate but heretical.  All the sacraments have a foundation in scripture - how these were pastorally implemented, etc. evolved but always grounded in our story - scripture.   
It has nothing to do with *rigor* - your statement is just plan ignorant and wrong.