Does it really remove the profit motive from incarceration? There are still thousands of vendors of various types making probably billions of dollars off of prisons, private facility or no.
More info: https://www.prisonpolicy.org/visitation/
Another example: getting rid of donated books and libraries in favor of paid tablets that also restrict the books you can buy, both for political and monetary reasons.
I just didn't think I needed to provide an exacting list of thing that will probably always involve a vendor. For example though unless the state gets into growing and preparing all the food from scratch there'll always be a food vendor in place, maybe just a normal food services company but it'll always be bought from someone, similarly for clothes and furniture.
I do think you're minimizing the issue in the way you talk about it, but the line about you not being aware of problems wasn't justified in the slightest and was just rude.