You can say that all you want, but it has connected for me over my long gaming history. I don't know how it's a difficult premise to connect: hide rolls = a greater chance of fudging. open rolls = less chance of fudging.I still say this is a non sequitur.
That makes sense for rules reference. I was a little shocked, but not surprised, to hear a few folks actually set up the cardboard screen in front of their PC while they play online.This is gonna sound dumb... but I don't play in person most of the time, -and- I use a DM Screen.
I mostly run TTRPGs online, these days. So I open up my DM Screen in a PDF and minimize it. When I need a quick clarification I can just alt-tab to it and then minimize it and get back to game.
For things that I need that aren't on a DM Screen, I just have A5e.Tools open in a browser tab so I can quickly search the site for anything specific that comes up. It's way faster than flipping through a book.
So... yes. I mostly play online, -and- I use a DM Screen. Though rolls are rarely "Hidden" unless it's me compiling random item loot or whatever. And that's less me hiding rolls and more me not cluttering up the public dice roller with a bunch of chart-rolling.
I usually stand while running in person games, so that aspect is less of a problem. But I am getting older and standing for 8 hours a few days in a row (like when I run multiple games at a con) is getting harder.I like the idea of using a screen.
However, I've found that it creates a barrier to being able to interact with players. I prefer to not use one.