This is a real issue. Graduate students are a very heterogenic bunch, with some study domains forfeiting very substantial wage and carreer opportunities by stay

This is a real issue. Graduate students are a very heterogenic bunch, with some study domains forfeiting very substantial wage and carreer opportunities by staying at university, and students in other fields have no or comparably very less lucrative prospects outside of academia. Not differentiating these groups does have a real impact. (I was on the board of a university so had a first row seat to this)