A Bit Unnecessary in a Petition to the Supreme Court?

Check out the last two sentences in this passage, from a recent petition for certiorari:

At the heart of the question presented by this petition is the term “quid pro quo“. Its meaning and significance inculcate that the writ should be granted in this case.

The term “quid pro quo“, though of Latin origin, is not an uncommon expression for those whose language is English. It is often used, especially in the legal field.