That's because PRO users know to buy an iPad Pro for all their iOS touch needs like swiping pictures, and a MacBook Pro for all their computer needs. Timmy and Jony have made it so simple for all the Pro $$ users.
I used the Surface Book for a project at the office for two months or so, and I loved it way more than my current MacBook Pro Retina.
The thing is, touch screen is really meant for when you want to transition into tablet mode (by detaching it from the keyboard). It worked really well in that mode, and their version of the Pencil/Pen was also quite nice (some noticeable lag at times, admittedly). I enjoyed working in that, but the two main problems I had were weight (not heavy to me, but I can see why it might be to many folks), and some software nuances like the software keyboard not automatically popping up when you go to write something.
For touch screen when it is in laptop mode, I used it occasionally and spontaneously. when I did use it, it was very helpful to have. For those of us who don't want to keep swiping away at the trackpad to mouse over to close a window for example, or want to hit that cell in Excel and switch back to another sheet. The touchscreen made those things a breeze. Trackpad was definitely my primary input in laptop mode, but having the touchscreen really helped.
You really have to try the Surface Book intuitively to enjoy it. You can't force a "touch only" laptop mode, otherwise yes, your wrist hurts. But when you start using it as a laptop with a trackpad, but having the OPTION to touch the screen to quickly do something or swipe something. I think that's where it hits the right notes. My MacBook Pro retina definitely feels behind and ancient, having experienced the Surface Book. And I don't think the new MacBooks closed that gap one bit.