You have such a strong prior that prison administrators are arbitrarily cruel that you just automatically dismiss any reasonable explanations for seemingly arbitrary policies by assuming they are lies and rationalizations?
Even in Scandinavia, maybe 20% of the prison staff weren’t downright awful people. The rest? Bullying prisoners was their daily entertainment, nothing but cruelty.
Yes. Don't you?
Must be from one of those nicer places where that's not the case.