I think you miss the point of Marv's quote. Yes, Marv and Ralph do care about fan's opinion's. But when it comes to making a decision they are paid to make the decision based on the resume of the candidate's and interview's. They make their decision on whats best for the team and the net result will hopefully be winning and then happy fans.
Fan's only see half the picture when making judgements. We only see the resume and not the interview process which is not enough info to make the right decision. Hence, the quote, "Listen to the fans and you will soon be one !"