Maybe they are interested only in future Ph.Ds and Professors. Anybody else is a burden to be sent somewhere else as soon as possible. Maybe they think they're

Maybe they are interested only in future Ph.Ds and Professors. Anybody else is a burden to be sent somewhere else as soon as possible. Maybe they think they're doing a favor to those students because they won't be wasting their time on subjects that are too difficult for them to grasp in the short time of a university class.