Real enlightenment is not at all free from all sorts of ignorance, but it is at all times aware of that ignorance as well as all the shortcomings of the self, whereas in the so-called enlightenment fueled by mysticism, the self gets consumed by the illusion of knowledge, which is worse than ignorance.
Darkness cannot be expelled with force, it can only be overwhelmed with light - ignorance and delusions cannot be expelled with force, they can only be overwhelmed with knowledge. And this process of overwhelming ignorance and delusions with knowledge is the practical enlightenment of a thinking society.