I have a theory that meditation/mindfulness is essentially just an excercise in self-erasure. This can be beneficial to some degree in that we all need to erase those negative associations and question our assumptions. However, carried to an extreme, it can erase some of the associations we need to make in order to live and create extreme hyper-selfawareness. Or in other words, you open up your mind too much, your brains start to fall out.