because that’s the way it works… it’s more for working/college students so they let you come and go whenever you want- you kind of make your own schedule. they also have set times, such as winter break, or summer break, where there is a larger amount of students who are off. you can also go for a year if you want… check it out.
I know some people who went there as well as the staff and it is a great place from all that I heard. They are supposed to be very good for the smart people who want a mixture of learning intellectually and philosophy, mostly for beginners and those who need to reinforce their connection.