I think one reason is that philosophers are more insecure to speak accessibly because non-philosophers are skeptical that philosophers have any special expertise. After all, all people - not just philosophers - have attitudes and points of view on various philosophical questions, and they rather resent being told that there are professionals who can think about these things better.
Rebecca GoldsteinIn order to refute a conclusion, you have to put forth the best possible argument for it.
Rebecca GoldsteinWhen we call a philosopher distinguished, we are not saying that she is worthy and not saying that she is recognized, but we are saying that she occupies the intersection of both - that she is recognized and worthy; even that she is recognized because she's worthy.
Rebecca GoldsteinIt's something that's very often said that philosophy, as opposed to science, never makes any progress.
Rebecca Goldstein