There is a great value in thinking about how to communicate science to the broader public. Physics is easiest though because the "We don't know" boundary is very clear and agreed on. Neuroscience, my field of sorts, has a big problem in that the "We don't know" boundary is literally everywhere.

Agreed. And part of the value is educating the public about how science is done and why we know things and why we don't. When scientists don't learn proper communication skills or refuse to engage the public in an accessible manner they leave space open for religious charlatans.