For those that are unaware, the Duggars are not JUST "christians." They are part of a sect that many people, including other formal christian denominations, accuse of being a CULT. It is called IBLP (sometimes also referred to as ATI as the schooling aspect of it). The founder, Bill Gothard, had been accused in a large lawsuit by women who were raised in IBLP that they were sexually abused by Gothard when they were minors. This was not some distant leader, the Duggars were very close to Gothard. So for people waving away the religious aspect, I believe this is very important context.
Also, homeschool strikes again! You know I love to say it - as someone who myself was homeschooled, had a good experience, and is now helping to homeschool a family member. Public or private schooling, along with more homeschool regulations, does NOT guarantee that we suddenly have a world without child abuse. Yes, lots of abuse happens with public school kids. Both with both public and private school, you have a first line of defense of safety nets. Whereas with unregulated homeschool, there ARE NO lines of defense. And it is used as a safe haven for abusers to legally make their victims disappear and make it virtually impossible for them to seek help, essentially trapping them. This relates to Joe and Kendra as they were homeschooled, and they homeschool their children, and virtually all of their friends are also in the homeschool community. This victim most likely had very little contact - if any at all - with people outside of the homeschool community. Which is one (of many) reasons why it took them a long time to reveal what had happen. What does a child do when their entire reality is only family and family friends and virtually no one outside that circle, which includes their abuser who comes from a family who is idolized in their community? Think about how much harder that is for the victim to come forward. It is a wonder any come forward at all, but I am glad they find the courage to do so. They are true heroines.