The statement that is fair, focused, and complex is:
A research psychologist recently published a case study showing that natural talent combined with consistent effort produces measurably higher success rates.
This statement presents a nuanced view by acknowledging the interplay between natural talent and hard work rather than dismissing the importance of hard work altogether. It is backed by research, making it more objective and focused. Additionally, it introduces complexity by emphasizing that success may depend on both talent and effort.