Programs for children.
Programs for teenagers.
Programs for college students.
Secular organizations understand how important an investment these programs for pre-adults are. They throw everything they have into training up the new generations to be compliant with their godless society. Some Christian communities understand, some don't. Even some of the ones that do aren't fully investing. A $75k/year adult-focused minister is reasonable but a $25k/year youth-focused minister is pushing it. And then they wonder why the youth group is so bad. Are they necessary for those "perfect kids" that are raised in "solid Christian" homes? Not always. But if a church has any desire to spread the gospel to those icky, messy sinners, why not offer programs for youth in addition to programs for adults? It's because adult programs are low-risk investments with immediate returns. Pre-adults don't have any money to give, so short-sighted Christian communities aren't concerned about them. That's why so many of these short-sighted congregations aren't growing, or are struggling to maintain current numbers, or are flat out dying.
In my neck of the woods: A huge majority of kids are raised by single parents, stepparents, grandparents, or non-Christian parents. It's not the kids fault that they aren't good Christian kids. They may have heard of Christ, but have never known a real follower of Christ. However, there are a good amount of Christian programs for children and teenagers here. The Southern Baptists and some non-denom communities know what's up. I'm actively participating in and promoting our city's first Christian program for college students. Well, there have been previous attempts but always unsuccessful. The leader, me, and a few others my age are committed to making it work. The hurdle is getting churches to understand that college kids aren't mature adults like they once were 100 years ago, and that it's the riskiest but most necessary investment to make because that's the age when even "good Christian" teens are ditching the faith. At least one church is already seeing the benefits, because they now have a fresh supply of intelligent volunteers to help out in other programs of the church.