One can't write without having read - you have to read before beginning to write - and universities offer a very good opportunity to read.
"Do you know," Ivan Bunin recalls Anton Chekhov saying to him in 1899, near the end of his too-short life, "for how many years I shall be read? Seven. " "Why seven?" Bunin asked. "Well," Chekhov answered, "seven and a half then. "