The Duggars do represent ‘fundamentalist family values’, and fundamentalist propaganda over time has actually promoted behavior exactly paralleling that of the Duggars as appropriate and holy. Check out this Chick tract (trigger warnings apply):
scans-daily.dreamwidth.org

In a better world, Mike Huckabee’s remarks defending Josh Duggar after this story broke would have instantly discredited his candidacy and forced his withdrawal from the race. Instead he’s either tied for 1st or polling only 2-3% behind the 1st place candidate (depending on which poll you look at).