"The people who show up regularly to the council meetings are not community members"
They are community members just not the ones who share your point of view. Those community members who might share your point of view don't show up.
I've never seen community members fight for density either. We want to tear down our housing so large buildings blocking the sky can be built by corporate landowners. You know who owns large buildings? Corporate landowners. The people with little houses are average citizens.
Public transit doesn't need density. Public transit exists in places with little density.
One, they quite literally do not live in the city. Most of them live in the very rich ex-urbs. Their retainers, too, do not live in the city, not even in the penthouses. They live in places like Alpharetta and Cobb.
Two, and more importantly, the issue is with their disproportionate influence. If we lived in a perfect world where your regular-degular corporate lawyer had the same say in politics as anybody else, sure, you'd have a point. But it's been more than a decade since Citizen's United (https://www.brennancenter.org/topics/money-politics/influenc...) and so that's not even close to reality: https://capitalbnews.org/georgia-lawmakers-real-estate-inves...