No, I’m a developer, I work in, I dunno what you want to call it, Machine Learning Data Engineering? Stuff like that.
I use seven displays because I like spatially organized workspaces. Four of them are only 10”, effectively 1280x800 displays, two of which are always showing terminals. I have a particular way I like to work that I’ve developed around how macOS handles multiple displays/Spaces that benefits more from many small displays than few large ones.
In the long run, I more greatly value the software I get to use on macOS (not to mention things like first party hardware and software support) over the window managers and that type of thing available elsewhere, and frankly, as a geek, it feels cool having a matrix-operator-like setup as my workstation so I’m happy.
I have many friends, most of whom are professionals, but none of whom are software devs. A bunch of them do devops and SRE work, a bunch of them are creative professionals, and a bunch of them are in other professional services, like finance and law. Personally, I work for an "IT services" company, essentially doing outsourced devops and ops for numerous other professional services companies.
What I'm getting at is that I know literally hundreds of professionals, across my personal and work life. The sum total of those in my life who need or use 6 displays: Zero.
You are not, in any way shape or form, a typical professional. If you need 6 displays (which you might, but I'd bet a dollar you don't) you're basically so far out of the ballpark of standard professional that you're on the moon.
Let's not pretend that the Surface Pro — or the Macbook Pro, for that matter — are in any way not suitable for the vast majority of professionals.