Why do seemingly all politicians (and no one else) do that hand gesture when they talk, the one where it looks like they're holding an invisible fishing rod?

https://lemmy.world/post/38038130

It’s more of a public speaker thing than just a politician thing, but… Well, politicians are all public speakers, so it makes sense that that’s the context you’ve seen it in.

It’s literally a practiced gesture - public speaking makes use of some gestures that telegraph well to crowds, but seem unusual otherwise. IIRC, that fishing rod grip is an alternative to gesturing with a fist - it looks less aggressive, but gets the point across.