The demand for that safe harbor and the political will to pass it is largely a result of Mormonism. The hierarchy of the church discourages anyone from criticizing the next level 'above' them. There is also strong societal pressure for Mormon wives to be stay-at-home mothers, but the economic reality means they often need to find some way to make additional money. Add that to the Mormon mission system, and you have a vast number of people comfortable making cold calls (whether for Elohim or doTERRA).