Is it that unreasonable to assume that the vast majority of professionals work from the same desk each day
No, but it would be unreasonable to assume that they do "actual work" exclusively or near-excursively from that desk. I have a mac at my work desk, and could have gotten a macbook too, but the reason I chose a thinkpad is the frequency I'm using peripherals in a meeting room. And nothing fancy either, often just a mouse, display out and network.
Why is it difficult to have a hub at your desk to plug your accessories into?
I guess I assume that the point of having a laptop is portable convenience, even if that makes me unreasonable. I don't find it unusual to want to do "actual work" from collaborative areas like meeting rooms, electronics labs or a co-workers desk. Or from home, or business travel.
This article is intentionally inflammatory and whingey.
[edit: grammar/wording]