There are other far more important "committees" that I worry about, namely the ones which could land me in jail if I didn't agree with their orthodoxy.
I am in the possession of a manuscript written by a reputable gca who wrote voluminously about the problems with working with committees. Like many technical people, he didn't like interference. And I haven't found a way to tell his story fairly and concisely while omitting this important aspect of how he perceived his work.
I think it is a natural, reflexive repulsion that subject experts feel when having to work with people who they consider to be rank amateurs in their fields, especially if the latter have influence and/or control. There are pros and cons, good committees and bad ones; gcas who are good stewards of their clients trust and money and others who put their personal interests first. I know that if I was a fiduciary, I would want other eyes and ears involved. And it has to do with much more than covering my behind.