There is nothing Wrong with those.....
Some people have not the ability of Imagination they need material help to get contact to what ever they want to contact.
That is not only the Statue who helps to pray to a god/godess/saint it is also the Ritual clothes, the Magic circle, the religious Symbols which act as crutch for those with not enough imagination.
I Don't think that there is a context between the Statue and the self, that makes no sense to me... If I want to pray to my self, my higher self, my unaware parts, my Ka, I would sit in front of a mirror if I had not the ability of Imagination.
As follower of the left hand path I see no wrong aspects in praying to the self because gods and godesses may give me Inspiration, hint, knowledge, but I am the only one, who has the ability to change my own life. It is my work not theirs. So for change I have to learn about myself, I wouldnt call it Prey but a dialogue with the soul. But for followers of monotheistic paths both words maybe the same in this context.