I am sure you are easily amused by people.
The Mac OS can easily be converted into allowing more touch control. Some of the UI already looks like a touch meny. Such as the decade old Dock. It would make perfect sense to actually touch these.
And dont forget the feature I think nobody uses, but has been there for a long time: Widgets. When you load this system, its like a predecessor to IOS. And also see this in reverse. The iMovie application for iOS is identical to the one on Mac OS.
Simply because regardsless of what platform we´re talking about, Apples design philiosphy is the same. Graphic intensive user interfaces that relies on a logic where the user can understand what he´s looking at, because it draws paralells to real life. Such as all the sliders, big icons, and not to mention their previously extreme use of skeumorphism. That absolutely remains in MacOS today. But at a much lighter scale.
In Apples official answer, the only reason for not doing it is this:
We did spend a great deal of time looking at this a number of years ago and came to the conclusion that to make the best personal computer, you can't try to turn MacOS into an iPhone," Schiller says. "Conversely, you can't turn iOS into a Mac.... So each one is best at what they're meant to be -- and we take what makes sense to add from each, but without fundamentally changing them so they're compromised."
According to Phil Schiller. But I suspect the truth is a more profitable explenation. They have two different high selling products. And the only reason for not merging them together is because that would diminish sales of these two. Take notice of how people such as Jony Ive, don´t really provide a good explenation of why they are keeping them separate.
He actually says he´s been tempted to do it in this article:
https://www.macrumors.com/2016/10/27/apples-phil-schiller-on-macbook-pro-price/ And Tim Cook himself has said "why would you even buy a computer today". So When they give you these ******** explenations, its all a cover up for the purpose of maximizing profits on their legacy products, before they die out. Something that will surely happen when the markets enforces it.