I think this is just down to the modern media technology/trends and kids lifestyles these days. When kid media staples such as Sesame Street, Mr. Rogers, Bill Nye the science guy, etc. is replaced by pop-style/hyper-paced youtube stars, what can you expect?

Would an average 8 year old be drawn towards 'Neil Armstrong or Chris Hadfield' or towards a popular youtube star close to their own age group?