OK, let me explore a bit further.
Yes, the parents are bullied into their children going to classes through confirmation. In that time, the parents are also bullied into taking their children to Church. It is thought by educators that this is better than not giving the children and young parents this exposure to the Church. In this time, many children grow in their faith. As has been the case in the US for ages, children often now evangelize their parents. Also, some of the parents become better exposed to the Church as they are part of various youth groups, including helping in education.
Yes, of course, many children and parents leave after confirmation. The educators in the US find the situation preferable to parents and children leaving after baptism. Baptist and non-denominational folks have a different approach. Children are expected to be in youth groups into their teens, when curiously enough they come forward and become part of their church. We can this last initiation rite "confirmation"; Baptists call it "baptism". And Baptists are starting to have naming or welcoming ceremonies for infants. Here on CF, we often get caught up in the details of theology. That is not what happens on the ground, in the local churches. We are communities taking our best shot at welcoming our children into the faith, and preparing them to face the world. As yes, when they leave for college, they will face the world, and often not come back to the church of their youth.
In the US, we have our ways. The rest of the world has different ways. The practical approaches of our churches are very similar. We have 1/3 or more of our adult going to church on a given weekend. For those in the Philippines, this is terrible. For those in Western Europe, Australia, New Zealand and Canada, they wonder how we have so many participating.
I am NOT one who thinks that the US where Christianity is dead because we have so many church denominations. Rather, I compare us to others, and see that perhaps our approach does indeed work. We are a nation of seekers. Yes, many have examined their faith and left the churches. Are there really fewer folks in the churches than 100 years ago. Do we understand the faith less than they did. Personally, I do NOT think so. We are very confused at the nostalgic period after WWII when so many were in our churches, blissful and not examining anything. I was alive then. I remember. I much prefer the 21st Century and its approach, built on freedom and respect of those from all races, creeds, and faith communities. We don't have a state Church, and IMHO have been much better for that choice.