Sticking to Proposal

I'm having some difficulties committing to my proposal. I stated that after every interview the respective doctors will comment/analyze/examine the interview. Unfortunately the both doctors are now saying that they can make a general statement for all of the interviewees because they would be repeating their selves over and over due to the fact that their symptoms are quite similar as they are all trying to fill a space in their lives. The doctors also said that they can only comment on what they saw which is a few minutes of footage whereas their real doctors would have years of information on the interviews.