It could be that either an interview is considered privalleged - and so any information you are told (and anything you tell the recruiter) is considered confide

It could be that either an interview is considered privalleged - and so any information you are told (and anything you tell the recruiter) is considered confidential anyway. In the same way that an employee doesn't need an NDA Of course the sensible thing is not to tell you anythign secret!