Earlier quoted context omitted.
I understand that there are legal barriers around it per the privacy policy but the fact that someone at Microsoft can just decide that they need file X off my laptop and then fetch it is way beyond the pale. If someone wants the files off my laptop, they can get a search warrant and successfully convince my lawyer that I am legally obliged to decrypt.
There is no evidence that Microsoft currently has the ability to arbitrarily fetch files from your computer. If your argument is that they could implement such a capability, that's always been true for any OS, including free operating systems, unless you audit the code and compile it yourself.
Haven't they in the past done exactly this in order to do people a favour by removing certain malware via windows update?