Like I said earlier, you're right. But, at that point, you literally have a MacBook without a touch screen... So, just buy a MacBook. The only thing you don't have is touch screen. Basically, everyone who wants an Apple Surface Book wants a MacBook with a touch screen. The problem is, I don't see the value added to this, and I agree with Apple when they say it is a poor option. Although, I don't really see the value in the 'Touch Bar' either.
A much more robust option would be to make iOS more feature rich and more seamlessly integrate iOS APPs with Desktop APPs. I think that's a much better option that trying to merge iOS with macOS into one or just give a MacBook a touch screen.