Simple. People can become experts at anything they wish. If we restore that idea, then we can dispense with the talking heads. (Not the band of course.)
Can they? Really?
Look, let us look at my case. I have a master degree in chemistry. Which is "just" a master degree. There are plenty of people who have more advanced degrees. So in my very area of education there are plenty of people that are much more expert.
But let us assume that I want to become an expert. I have a decent job with a decent salary, so I can live from one job and don't have to combine different jobs. That's already a head start compared to a lot of people.
A day counts 24 hours. Say 6 hours of sleep, that's 18 hours left. 8 hours working plus a daily commute of 2 hours (back and forth) so my jobs requires 10 hours a day. That's 8 hours left for house chores, eating, personal hygiene, sex, talking to my wife and family, working out, writing silly stuff on discussion boards, attending funerals, gardening, grocery shopping etc. If you cram that, there is not a lot of time left over for studying.
And that is building upon a solid foundation of chemistry knowledge already present. If you want to become an expert in a subject that is totally new, it's even much harder.
And becoming an expert in let us say climate change will exclude to become an expert in vaccination, nutritional science, paleontology etc. So you will still have to rely on experts.
So we are back at square one: how do we make people realize that they don't know best in everything (and fat chances are, they even don't know the best in anything) and that experts are just that, people who know better than most (including you and me)?
edit: which doesn't mean that people should not try to improve themselves. I believe in life long education and improvement. And thanks to the internet there are plenty of sites that offer textbooks of all levels -- from beginners to advanced college level textbook -- there are plenty of educational channels on Youtube etc. It's just much harder than you made it look.