Sorry, but you’re reading way too much into my comment. I’m simply talking about people who won’t make themselves heard in a situation appropriate to speak loudly, not speaking loudly in all circumstances. I used to be active in the Neighborhood Assn, and people would sit in a small auditorium and ask questions or come to the front and present an issue in a normal speaking voice, and no one could hear them. When asked to speak up, they repeated it in the same voice. This happened more times than I could count.
Haven’t you ever sat in a overloud restaurant with a number of people, and can’t participate in a conversation between the person next to you and their neighbor, because they’re speaking just loud enough for only them to hear? Not intentionally to exclude you, it’s just that they’re oblivious and being virtuously soft spoken. People are also oblivious to the effects of wind and speaking direction in addition to background noise levels.