I have lived in the Land of Bleak, on the edge of the Volcano of Despair. Frodo and I don't have much farther to go.

Seriously, that is true. More memories are simply forgotten than blocked. Blocked memories are almost entirely related to traumas.

I'm only referencing the Matrix with "ignorance is bliss" comment. We don't really live in a world like that. But you must agree ignorance leaves people with a lack of responsibility.