Honestly, yes - the phoning home / telemetry issues really are NOT huge concerns for us.
Our company doesn't have to be compliant with any of the multiple initialed government standards like HIPAA, FURPA, or what-not. So there's that.
But realistically, when your business standardizes on using the most popular operating system in the world (which I think is fair to say is Microsoft Windows), and you make an effort to secure your environment in other ways (a firewall in place, anti-virus software with central management and updates, spam filtering on all incoming corporate email, a corporate VPN provided for connecting back in to the office from remote sites, and ensuring all the computers and applications receive regular update patches), you should have a functional, relatively secure environment for people to work in.
The fact that Microsoft might be "spying" on what our users look at online, or keeping tabs on their Cortana search requests, or whatever else they're analyzing as the OS is used? That's something I think you wind up having to file under "part of the package deal of using Windows", under the circumstances. Is there any evidence Microsoft *ever* did anything malicious with user data of this sort that they gathered up? Are companies out there who were ruined when Microsoft distributed their intellectual property to competitors after sucking it down via standard mechanisms built into Windows itself? I'd have to say no.
I know there are many in the Linux community who find the whole thing completely unacceptable. But there are a lot of things people take issue with on principle when they're talking about their individual computers or devices and personal data. Things tend to be different for businesses, where corporate information is trusted, every day, with employees or even freelance workers who could theoretically leak all of it out to competitors or otherwise cause corporate espionage with it. You have to learn to put some level of trust in people (or other companies you partner with), and carry insurance to help mitigate financial problems when that trust is misplaced and things go wrong. Perhaps you even get the courts involved, if you can put together enough evidence of what happened to you after the fact.
It's a balancing act though.... How much value do you get from using a product, vs. potential risks or downsides of it helping itself to certain types of information that flow through it?