My friend Josh is 40 years old and unemployed. I might suggest that he goes back to school, to get a bachelor's degree. I might like to suggest that he apply to Toronto Metropolitan University (TMU), since it's a good school which is reasonably close to him. Unfortunately, many programs there only accept full-time students. If you don't graduate within a set time limit (usually eight years), you might possibly get kicked out of the school. Because of this I think of suggesting other schools that are otherwise not as good a fit.
My question
Why do some schools not allow part-time students in some programs? Is it because they're worried that a program could close down sometime in the future?
I admit that it would be slow and expensive to close down a part-time program in the usual way. But, if that's the concern, perhaps the school could give all new applicants some warning like this: "We do accept part-time students. But part-time programs may close down unexpectedly and without much warning. If this happens, you may need to find some other school to transfer to."