Childlike wonder is built on the bedrock of ignorance.
The more you learn about something the more you develop an opinion and create friction with your own view points. Then when you see something familiar but slightly different the friction creates a voiced opinion that seems like jaded cynicism. However that friction is where creativity lives. You need to take that friction and create, help the world be better for the next generation as they gaze in awe and childlike wonder at your creations.
Recognize your mortality and grow, don’t shy away from it.

Anyone advocating for child like wonder as an adult by looking deeper and not seeing the bigger picture is advocating for mindless consumerism. Don’t shy away from reality because it is difficult.