If I PhotoRead a book about Launching a Rocket to the Moon and I am not a Rocket Scientist and I have no interest in launching a rocket then I see no reason for me to use the information in any way shape or form. Unless I do manual activation the is no reason for my mind to give any time toward this information therefore it will not activate.

It gets filtered by my non conscious mind as serving no purpose along with the other millions of bits of information per second that my mind picks in every moment of my life.

If it isn't useful to you then in all probability, it won't activate on it's own.

Alex