Chapter 3 says the church is the extension of the family, then immediately rejects the idea that a healthy church could consist mainly of one age group. That makes the point structural, not sentimental: a congregation that lacks grandparents, parents, and children no longer mirrors the social form restoration is aiming at.
This matters because multi-generational life does more than create a pleasant atmosphere. It gives people actual roles of honoring, mentoring, receiving, correcting, and being known across age lines. Without that range, “church as family” becomes branding rather than practice.
For MNFC and similar communities, this becomes a diagnostic question: if a visitor looked at the room, would they see a family-shaped people or a niche demographic gathering?