I'm wondering who these programmers are who are sitting down for eight hours a day, pumping out perfect code at 200wpm without any breaks. I suspect they might not exist.
You should give these tools a try. From my perspective it's like someone sitting on a small wooden chair and you are proposing an Aeron. Yes, they are both chairs and you'll be sitting and perform the same task but boy the ergonomic chair will save you from some real back-pain.
Meanwhile some of us already had setups broader than that in scope: I use vim, a tiled window manager with vim-like keybindings, and Tridactyl to control Firefox with vim-like keybindings. Can do just about everything without touching the mouse, including browsing HN and other sites.
Plus, I have more time and energy for writing code later. Or other activities.
I admire consummate professionals who can immerse themselves in the craft. I can't do it. I still put out great work - definitely not the best ever - and the tools lessen my mental and physical burden. I have more energy that I can spend elsewhere.
We replaced the punchcards and terminals and line editors with different tools because the trade-offs were worth it. Maybe we can keep adapt new tooling in a similar matter when it makes sense.
I don't have a problem with my "productivity", whatever that means. I'm not trying to write code faster, my own experience is that writing code faster leads to shitter code. I'm not hindered by my tools, and most of my programming time is spent thinking and understanding, and none of these tools have afforded me better thinking or understanding, and often times they get in the way of my thinking.