yeah very true. i watched a similar documentary about mormonism a while back and a lot of the interview subjects were "former LDS members". it was a funny experience to be looking to them for "wisdom" about the church during the movie only to realize later that they'd only left to form offshoots of LDS that still relied on the basic mormon belief system.
another area where the movie falls short is in not asking someone as obviously bright and aware as paul haggis to discuss why he allowed himself to be so intentionally ignorant for so long. it boggles my mind that someone like him could spend 30 years in this culture and never once have occasion to think critically about any of it. i get why some of the folks wouldn't have been the right people to get to talk more openly about that, but haggis in particular seems pretty clearly capable of digging into his own failures, so to leave that question unasked is a problem imo.