It is a good read… I think that Rod, the author of The Benedict Option, wouldn’t disagree with anything in it. In fact, one of the “points” of the Benedict Option is to make sure the faith survives in a form that is potent enough to have the ability to change the culture, and he never calls for a “retreat.”
As to how we can balance the two… I think God has always handled that in calling different members of His Body into different roles, even as He does now. Some are called to form families, some are called to serve the body in particular roles in the public sphere, some to apologetics, etc… but I think the key is having an actual community base from which to fully live out a Christian life in Christian culture.
Yes, those outside of the Christian culture are always going to be suspect of those inside. It kinda goes with the territory. There are those that see the government in the role of God, or “god” rather. They trust the government even though it is ran by people just as capable of corruption, manipulation, and lying as every human is capable of. True Christians follow the laws of their land up to the point they contradict God’s ways, and they make good citizens.
But, if the secular culture gets too bad, you will indeed see Christians being hunted down in a much more forward way than they are now. So, you still need good Christians who are called to do so to be lawyers, accountants, plumbers, mechanics, etc… Those who can serve inside the community and those who can serve outside of it in a defensive posture.