But I think that just might reflect the fact that economists use Twitter for technical academic discussions more than scientists do.
blogs.lse.ac.uk/businessreview…
But there's not necessarily a trade-off there - you can tweet about research AND tweet to the public in simpler terms, if you want.
We know a lot about how gravity works. We don't know a lot about how recessions work.
When you have less certainty, it's good to evangelize less.