Using film enforces creative and technical skill. With film, one has to get it right the first time. Students need to learn how to do expose, light, and compose so their results can be proper expressions of art.
Shooting hundreds of exposures in the hope that some of them might be good is more akin to gambling than creativity.
Also, of course, electronic capture has not proven itself equal to film, although this gap is narrowing daily.
Eventually any photographer must choose his or her tools, but by learning with film, the student will master skills sooner and better than with an electronic "crutch."