You should also ask yourself why Apple allow everything on your iPhone to be sync'd using iTunes except for your contacts and calendar?
Because Contacts & Calendars used Sync Services, which was removed from Mavericks. (because it was flaky).
The same version of iTunes will still sync local contacts & calendars with Windows (far more Windows users have iDevices than Mac OS Mavericsk users) and previous versions of Mac OS.
Why do they only want to harvest your movements (calendar) and the entire network of people you know (contacts)?
They aren't harvesting anything, Mr Tin Foil Hat.
I'd be far, FAR more worried about the health info & payroll data info your wife and her co-workers are carrying around on their personal devices.
(FYI: They cannot simply use any device they want for BYOD or connect to the company intranet. It must meet certain standards for locking/encryption/internet use before it would be allowed).
Perhaps when you mature a little you will be able to engage in a constructive discussion about something that clearly represents a problem for most people
You mean for relatively very few people.
I think Blackberry just become a viable choice for companies again - the NSA really didn't like their encryption...
What does the NSA not liking their encryption have to do with them becoming a viable company again?
The NSA does not like Apple's encryption far more than they don't like BlackBerry's. and Blackberry has pretty much had it's run so, no, companies are not looking to them to rise from the ashes.
-> iCloud: iCloud security and privacy overview