100% it's fishy, are they hiding processes from the PC admins?
A.I. dumping you details to the cloud?
There are now folders on the PC that admins are not permitted to access.
That's right, your PC, your disk, but you can't go into certain places.
Why would that be?
Something to hide?
I think it has always been this way to prevent malware from hacking/corrupting the system (this is very complicated, and it goes back to at least windows 7). However, I do understand your concern. Though I doubt they would go this far to hide anything. There are plenty of services that are called telemetry that you can easily find.