Office has been available for Mac for well over two decades. There are so many more reasons for companies preferring Windows on the desktop than just Office.
The actual problem is the lack of Group Policy support (or even a viable equivalent - preferably one that's cross-platform).
The only part of "Office" I really even use though is Outlook (at work), and it's pretty good at the job it does.
[0] https://support.office.com/en-us/article/how-to-install-and-...