This has nothing to do with either SV or tech in general, it's like blaming car makers for Al Capone because he used them to get away from the police.
It's more like blaming Ford for the Pinto ("unsafe at any speed"). Deliberate design choices are what made fake news effective.
Think of Fake News as spam email: Gmail (and others) mostly solved spam email because they decided to. Apple made a deliberate decision to manually review apps in the AppStore. Twitter made the deliberate decision not to ban spam bots in its ToS(!). Facebook made a deliberate decision to reward engagement on links.
It's more like blaming Ford for the Pinto ("unsafe at any speed"). Deliberate design choices are what made fake news effective.
Think of Fake News as spam email: Gmail (and others) mostly solved spam email because they decided to. Apple made a deliberate decision to manually review apps in the AppStore. Twitter made the deliberate decision not to ban spam bots in its ToS(!). Facebook made a deliberate decision to reward engagement on links.