4-Apple is looking to expand their money source, maybe develop the iWork Suite to be an MS Office competitor. Free for home users and paid for businesses. This will also break MS monopoly clutch on business/organizations world wide. Options are good.
I am not sure where you took this from. Apple has neglected iWork for many years. Pages does not even have cross-references, which is a basic feature for a serious word processor.
I am also not sure how would Apple would gain a significant market share on this front. Microsoft Office can run on every PC, computers which can be far cheaper than a Mac. Many businesses would not even have the budget to buy Macs to run iWork. And why would they?
Microsoft Office is full-featured and fully compatible with documents produced around the world. Switching to an alternative might break this compatibility. LibreOffice/OpenOffice has tried to be compatible with Microsoft Office for years now, but it is still not 100% compatible.
People are already trained on Microsoft Office. Switching to iWork might require additional training, which costs a lot of money.
Companies use add-ons to Microsoft Office software. iWork would not have such add-ons. It would cost money to buy or develop such add-ons for iWork.
Microsoft has a history of reliability. It has released a new version of Office every three years for many years now. Businesses can rely that Microsoft Office will be around for the foreseeable future. Apple is unreliable in respect to iWork. Apple has neglected iWork and even removed features once. And Apple has ceased development on iLife and other software. A serious business would hardly trust Apple to keep delivering updated versions of iWork.
Microsoft Office is part of the core Microsoft business. It is great software that trounces its competitors. Perhaps Microsoft Office is clunky on macOS, but it runs smoothly on Windows, and integrates very well with it. Apple would have to spend many billions to compete with Microsoft Office, and it does not seem to me it would be part of Apple's core strategy right now.