Many master’s programs in the arts are not funded, and students do borrow to complete these programs (and they do repay their loans in the same manner students in other disciplines repay their loans - I have yet to see any documentation proving otherwise). In the art world, an MFA is a terminal degree & qualifies a graduate to teach at the university level.
The programs at A.R.T. are NOT graduate degree programs - they are graduate certificate programs, which is why they fall under gainful employment reporting requirements.