This isn't really true, you can use whatever language you want for the programming sections. If you say you only know PHP, they'll find you four interviewers that know PHP.
Interview feedback is not really "filling out a form", either. I take about 6 hours to write feedback for a 45 minute interview. It's very detailed and really covers a chronology of what happened during the interview. Interviewers also submit a hire/no hire score for the candidate, so it's not only the hiring committee that makes the hiring decision. If an interviewer is willing to say "this is the best person I've ever interviewed in my life", that's a big deal.
Interview feedback is not really "filling out a form", either. I take about 6 hours to write feedback for a 45 minute interview. It's very detailed and really covers a chronology of what happened during the interview. Interviewers also submit a hire/no hire score for the candidate, so it's not only the hiring committee that makes the hiring decision. If an interviewer is willing to say "this is the best person I've ever interviewed in my life", that's a big deal.