I like to be efficient so I detest when one uses extra words or phases that are not necessary.
The significance of "in and of itself" (phony baloney grammatical objections ignored) is that it is classic Anglo-Saxon. The earliest English speakers were very fond of such repetition, or redundancy, if you prefer. "It is fitting and proper" is a classic example of this. More than fifteen hundred years aster the language stumbled to its feet, that trait remains.
gold used as verb