Turner claimed that the frontier produced the individualism that is the hallmark of American culture, and that this individualism in turn promoted democratic institutions and economic equality.
I think that it's grossly overstated that one needs to have contact with the opposite sex right through the whole of life, in the classroom and outside the classroom and at all ages.
Apple's stance on these issues emerged post-Snowden, when the company started putting in place a series of technologies that, by default, make use of encryption to limit access to people's data.