Also, I don't consider an employer having total visibility into its devices to be a power-trip. The onus is on the employee to keep their personal stuff out if they don't want it getting swept up. Of all companies, even Google couldn't design machine learning or quarantining sufficient to wall off personal data from company data inside someone's phone during their forensic prevention and investigation. So the legal department sure isn't going to promise they can unbake the cake that is your voluntarily mixed-use device.
That's fair, and I agree with that (as long as it's company-owned hardware and not personal hardware under a BYOD program). But I personally do not want to (and currently do not) work for a company that trusts me so little that it needs to spy on every activity I do on the hardware they give me to do my job.
I get that some people are fine with that, and that's ok, but I'm not, and I don't think I'm alone in this.