Someone who is doing serious work with LaTex is likely to use it for the entire document rather than cobble together Latex with any word processor and risk not having it look "just right."
Which, while likely true as MS is in the business of making money, is irrelevant Office's usefulness on the Mac.
And I started with Applewriter on the ][ and have gone through many iterations of word processors as well. All have pluses and minuses.
Really? You must be joking. Sure you can do a video conference call but that's about it.
You can't even initiate a FaceTime call from a non-Apple device, setup the meeting and invite attendees, etc., let alone share a screen and have all attendees work on the same spreadsheet at the same time and see everyone's edits in real time.
Unfortunately, that one thing done well leaves out key things some people need to get work done. Apple hasn't really been interested in the business software market and basically ceded it to MS.
No one is trying to sell you on anything. You have a solution that works for you, which is great, but doesn't for many people.
It's tool, and you should use what is appropriate for the job at hand.
And they choose what gets the job done, and not just Office. Scrivener is a much better tool for writing than iWorks or Office, for example. The original questions was about why do people use Office, and tehre have been a lot pf valid reasons why it is the preferred choice, even if it is not yours.
Sometimes, but that doesn't mean the competing product is a better choice, or worse choice, just another choice; and even some of the simple functionality, such as macros, are not readily available in iWorks or some of the competing products. Or changing the color of an object based on a cell value.
iWorks does a number of things well and is quite suitable for a lot of users, but there are plenty of use cases where it doesn't and that's one reason it isn't a viable Office replacement for many users.
And plenty of others have.
But you never answered the question:
What functionality does iWorks offer on the iPad that MS Office doesn't?
Have you tried Scrivener? It might be a good affordable solution, especially since it makes it easy to create various versions as you describe.