Lots of news photos are taken with the 20-21mm effective focal length (14mm when shooting digital or 12-24 zooms at the wide end), which adds more distortion on the edges.
It doesn't really have anything to do with SLR versus RF. Instead, it's the perspective of being in so close and wide.
These lenses have gotten so popular because press photographers usually have to push their way to the front of a crowd, then find themselves working in a very confined space. I think these lenses do have a very "newsy" feel to them. I worked for newspapers for a number of years and made fairly regular use of the 21mm lens. For my own photography, I hard ever use it.
Nikon S2, S3, S3-2000, SP, SP-2005 / Kiev 2a
Biogon 21/4.5; CV 21/4; CV 25/4; CV 85/3.5; the following Nikkors: 2.8cm/3.5; 3.5cm/1.8 (1956 and 2005 versions); 5cm/1.4; 8.5cm/2; 10.5cm/2.5; 13.5cm/3.5
Soviet lenses: Orion 28/6; Jupiter-12 35/2.8; Helios-103 50/1.8; Jupiter-8 50/2