All things being equal, not having that agent of socialization renders one less developed than someone with religion.
All notions that the typical religious person relies on a book to give their morality to them are fallacious at best. Also, the notion that the many contradictions in the bible somehow invalidate it are equally irrelevant.
The bible is a tool, like any text book. Referring back to it is no different, I repeat, NO different than referring back to a source or reference in any debate.
As a tangent: If the bible can be interpreted however one chooses, then all interpretations rationalizing unethical actions are the fault of the interpreter, not an inanimate book.
Neither do guns kill people or my keyboard misspell words.