Think it through - the reason to run the regular MacOS would presumably be to run regular OSX applications. But those applications were never meant to be run on a slate, they were meant to use keyboard and mouse (and typically more screen real estate).
You're asking for a bad user experience.
So the system would presumably provide kludges for being able to navigate and input data in current apps. And where would that leave future software - should it use a keyboard/mouse interface, or a gesture interface or try to cater to both?
No, Apple understands that the interface paradigms aren't interchangeable. They already provide small portable MacOS systems to run MacOS apps. You could wish for something smaller and lighter than the MacBook Air, but a tablet isn't it. A tablet is another kind of interface paradigm. Trying to make MacOS and its applications run via touch on a small tablet is simply not a good idea, particularly not when Apple already has what is arguably the best touch interface in the industry in somewhat different class of devices, and can leverage that and its legions of developers immediately.
If you're asking for an actual iMac with a touch interface, forcing you to not only shift your hands away from the keyboard to the mouse, but also up and waving around on the screen you try to work on - then YES you're the only one wishing for that kind of ergonomic disaster.