This disconnect is the number-one threat to science librarianship today—perhaps to all academic librarianship. How can science libraries persist when scientists haven't the least notion that libraries or librarians are relevant to their work?
"Libraries were once the center of the information universe. Fifteen years ago, if I had told you about the coming internet, you would have assumed that libraries would have a prominent place on it. They don't.
Libraries, including WorldCat, rarely show up in web searches, even for books. I lay the blame squarely at the wrong-headed decision to keep library data off the "real web" and to push WorldCat as a "aggregation point" for nobody.