That's no longer guaranteed, or even likely. For Americans coming of age in a postmodern world, religious training occurs at the hands of popular culture and personal experience. That makes film and other mass media the primary sources of popular theology and mythology today. They help define what we value and how we conceptualize God. Film is proving a very effective tutor, by the way, whether or not you like the message.
Films raise important questions about life, questions the church too often is unwilling to ask.
The church's silence forces many of us into dialogue with popular culture in search of answers. All this doesn't mean we're not learning about Jesus through popular culture. He's a fixture in Hollywood, although you might not always recognize his various mutations. Baby Boomers were raised on these. As church attendance soared after World War II, so did the popularity of the religious epics of the 1950s, which were a reflection of post-war optimism.