I have lots of real examples.
No, you don't.
No, then you have a bezel in the way. If I'm editing graphics I don't want to be having to work around a bezel.
So don't split between the bezel. Or get monitors without them. Thinking the bezel is as bad as you do is the only thing stupid around here.
What's the "more" you can do by having your pixels spread out across different displays?
Freedom to arrange the pixels the way I want. Easier to mix and match different window sizes. Can mix and match between full screen applications (games, mostly) with those that aren't.
Except it's not.
I see you know absolutely nothing about this topic. They're called preview devices.
Which doesn't inherently mean they are using multiple monitors, but probably do because there are probably multiple people looking at it. They could do exactly the same setup as you do the work and preview in different windows.
But feel free to keep displaying your lack of knowledge and inability to argue.