I've read and heard that old-school preaching and lecturing is out, in favour of participatory interactive dialogue. It does make sense that this is how people think, and it further makes sense to attempt to work with that if that's your audience. However, if your audience won't sit still for 30 minutes to get the hang of a deep idea, then only the shallow ideas can be conveyed. If your audience passes out from boredom after 30 seconds, our next generation won't know how to operate our nuclear power plants, build rockets or, for that matter, drive a car or bake a cake.
Mokalus of Borg
PS - If it can't be learned in 30-second chunks, it can't be conveyed this way.
PPS - Most advanced skills and ideas fit that description.