I don't think she's someone to be admired. Being ceo of an app that is IMO rife with bigotry, xenophobia, and scare mongering.
The platform shaping communication is a fact, but not a license to use it to program a worldview. The job of a general-purpose platform is to enable communication, but otherwise stay out of the way.
I don't use it a lot. But my Nextdoor is basically pictures of animal sightings, pictures of pets who got out and pictures, a few hours later, of them being found.