The studies about literacy showed that the illiterate mind is incapable of differentiating between relationships and abstract thinking. The skills aren't developed in the brain! Freedom being an abstract notion, requires one to be able to connect facts, experiences, and learned information together. Therefore, an illiterate mind is unable to comprehend why the loss of freedoms is a bad thing. If the illiterate mind isn't shown an example in a way that's been experienced first hand, it isn't able to rationalize the relationships between other information and experiences.
Example, if an illiterate person has never eaten or seen an orange, they are incapable of understanding what an apple is. They're able to understand a grapefruit, though. The same applies to guns. If an illiterate mind doesn't understand the significance of the importance of firearms, they see it as no big deal when they're no longer available to people. They also don't see it as a problem having other people tell them what to do, when to do it, and how to do it. That's why, as a general observation, illiterate people do well in fast food, landscaping(sorry marn), manual labor, as prison inmates, etc. the literate mind however actually needs to be self sufficient and think and act for itself! Illiterate minds also typically has very poor memories outside of their comfort zone. This is why so many people can't remember what politicians have done in the past, and how they keep getting re-elected..
Keep in mind, there are varying degrees of literacy.
The difference between stupidity and ignorance. Ignorance is doing something wrong and not knowing better. Stupidity is knowing better, but doing it anyway. Don't be stupid!