I know a family of choshuv tzadikim that exposed their children to the outside world. The first one had a child go OTD. The child that stayed didn’t learn from it and also had a son that went OTD. His son that stayed had a bunch of sons that went far away to live amongst and interact with non-Jews.
In the long run their descendants turned out fine.
For privacy I won’t give their last name. But their first names were Avraham, Yitzchok, and Yaakov.
