The problem is that the vast majority of HR departments do not have the time to look at those other signals. Resumes are filtered based on GPA and other measurable numbers first.
And likely, if it's a large zombie-automated HR department, I wouldn't want to work there anyways.
I do put it, because I can say that with that score (not GPA, but 94/100 score) I was the best of my class/generation.
The Resume is an advertisement, you don't see Coca-Cola advertising that their sugary drinks can make people fat.
The problem is that the vast majority of HR departments do not have the time to look at those other signals. Resumes are filtered based on GPA and other measurable numbers first.