Earlier quoted context omitted.
I hope iOS 13 will have mouse support for the iPad Pro. Only being able to touch the screen while using the iPad Pro in laptop mode feels really limiting.
All that horsepower, no accurate steering wheel. Is it a pro device if the choice to add a mouse isn't there? Many pros work in pixel accurate selection instead of pencil or finger.
See how Autocad was using a command line for ages to implement precise control over coordinates. Don't need a mouse for that. At the same time, the imprecise things that you use mouse for (e.g. dropping a symbol from a library into a workspace, or connecting controls with outlets in an interface builder) are much easier to do using a direct touch.