For example, if you are working with spreadsheets, no one has come up with a more efficient method of interaction than by using a mouse. Touch works, but slows down the user to the point it is adding unacceptable time to completion of tasks.
Also, if you are working on a document with various objects (like a complex presentation) and you had your iPad Pro attached to an external display as a mirror, your keyboard allows you to manipulate the screen via shortcuts, because the cursor (a type of pointer) is mirrored. Unfortunately, if you needed to, say rearrange objects, then the current situation is that you you have to remove your attention from your large display, go to your iPad Pro and then move the objects. It would be more efficient to have a mouse pointer, mirrored like your keyboard cursor.
I understand and you’re right. However, as you’ve explained, doing it on an iPad is still possible. It’s just more cumbersome in some situations without a type of pointer. It’s still possible to complete the task, just not in the way that we are used to doing it. My original response to @earthdog was asking what “more” could me done. Not what could be done more easily. Many of us are developing new ways to do things. My two older kids are in school. They both have MacBooks and prefer the workflow of their iPads. It’s just the workflow they’ve grown up using. Neither of them have ever owned an actual mouse.