why would people have a biblical worldview with the usual approach to discipleship in the local church?

Here's what we observe (in this article, other evidence, and everyday life):

-many people in churches

-many people believe they have a biblical worldview

-very few people (6% in this survey) have a biblical worldview

This is troubling but not surprising. The #1 problem is the church's failure to disciple well, relying mostly on the minimal impact of sermons, light/passive small groups, and light/large youth groups. Few pastors/churches have a vision or a plan to focus on discipleship-- ironically, failing to implement/emulate the ministry model of Jesus. (What Would Jesus Do? Not rely on great sermons and passive small groups!) The result is that people are discipled much more by the culture than the Church.

One way to remedy this for you locally: join a "Getting Equipped" that will start just after Labor Day. (Details below or PM me.) Long-term or non-local: Check out ThoroughlyEquipped.com and let me know how we can help you fulfill the ops/commands of Ephesians 4:11-16 and the "teaching them to obey all" of the Great Commission.