I think when you go to prison, in addition to giving up your freedom of movement, you give up your dietary preferences.
I was actually pleasantly surprised by the article. I thought it would be about SBF getting special treatment in prison on account of his wealth and connections and that would be the failure described.
Seeing the actual article makes me feel that he is being treated justly.
Remember SBF is a psychopath and will say or do anything to manipulate people.