It really isnt, people in prison, or people all together will always find novel ways to communicate, and on this case use books, yet the net benefit of them having access to literature is itself good on a whole other level vs the smaller drawbacks which happen from some of them being cuts, this ofc is without getting into the core fundamental that prison is supposed to be there as both a chance of rehab and as a place to separate them from society temporarily let alone this just being inhumane treatment