Or he's concerned because 86% of the asymptomatic carriers may be unknowingly spreading the virus to their friends, classmates, coworkers, customers, and professors.
When I've talked to Wynne, he seemed very hopeful regarding containment of the spread and maintenance of in-person classes. He's a realist who knows there will be cases, but wants to limit and contain those cases. What the media and helicopter moms do with his words is another story though.