In actually useful business problems, there is trust to be "exploited" to make the system simpler than Byzantine algorithms can manage. And what if the trust is exploited for theft? Then the parties take a loss, learn who can't be trusted, and get on with business.
Humans trust. Their systems should too.
> “How can you make a reliable computer service?” the presenter will ask in an innocent voice before continuing, “It may be difficult if you can’t trust anything and the entire concept of happiness is a lie designed by unseen overlords of endless deceptive power.”
If you didn't know Mickens[0] and you enjoyed this piece, you may want to peruse more of the same[1]. They're not all this good, but they are good.
[0] which I discovered through HN years ago, thanks folks [1] https://danielcompton.net/james-mickens-collection