I work in a similar field in Canada. I always believe the best place for children to be is with their parents, as long as they are safe and happy. Removing children will always cause harm to children so it should be avoided at all costs.
And if children can’t be with their parents, they should be with family. However the Duggars have hidden and helped Josh in the past and I’m not convinced they won’t in the future. So if the children have to go somewhere, I wouldn’t want it to be any of the Duggars.
I’m not saying her brother will be successful either, just that he might try.