Conveniently, this "simplest" explanation for the Bernie campaign's failure is also exculpatory of the people who worked in and around the campaign https://twitter.com/davidsirota/status/1249562901628612609
I don't know if the New York Times is included in this fatalistic, self-absolving critique, but they published a largely positive profile of none other than David Sirota in January: https://www.nytimes.com/2020/01/21/us/politics/david-sirota-bernie-sanders.html
Why did the Bernie campaign even bother in the first place if this highly-fatalistic interpretation of their failure is accurate? I thought the point was to win the nomination. If the conditions were such that he really never could've won, why did they waste everyone's time?