Most documentaries have always been very low on information density. Even universally loved ones like something from David Attenborough are mostly a collection of disconnected (yet amazing) film snippets with a bit of commentary over the top. It's only gotten worse as narrative has become more of the focus.
There are exceptions, but when it comes to conveying meaningful information and detailed analysis youtube is far superior than mainstream documentaries.
Except everything done by the BBC. I am so sick of slow-paced american docs that inevitably swing into conspiracy rants and crying interviews. If there is a BBC doc availible on a subject, that is the one i will risk my hour of free time watching.
I too watched the 3 Mile Island netflix thing. The only fact i trust is the coincidence of The China Syndrome hitting theaters the week prior the accident, and only after i verified through imdb.
There was no real attempt to compare the enormous toll of deaths and environmental damage of fossil fuels compared to nuclear. I kept thinking "did Shell commission this?".
All the true crime stuff is retired officers cashing in. So much for books.