> By your logic, any documentary that interviews prison inmates would be unethical.

All ethical filmmakers carefully consider ethics in situations where people might feel compelled to participate. Prison is one such situation.

I'm not saying it's impossible to ethically film inmates, but it is very worrying she brushes off the possibility she might need to carefully consider it.

It's (almost always) unethical to interview inmates held in repressive dictatorships because there are so many different ways you can violate their rights and put them at risk.