Firstly, how do you know it is truly anonymous? And is this anonymisation being done on the users machine, or one Microsoft's servers? If the latter, MS has access to unanonymised data.
Secondly, cross-referenced with other 'anonymised' data sets it is quite possible to de-anonymise people. I'm not convinced there is any such thing as a truly anonymous data set anymore, not when it comes to data collected from a users device.
A governement can automate it to follow it back to the user, but a corporation can't.
They are the only ones that show it this straight forward, can you find a page like that on one of the other big tech companies? ( Apple, Google, Amazon)
TL;DR; You can follow it back to a specific device, but you can't follow it back to "who is the user". Which seems to be a valid business decision, considering the complex matter they are in ( the biggest variety of devices and users).
You can also check it for yourselve: https://www.theverge.com/2018/1/24/16927056/microsoft-window...
Telemetry can also be disabled
This seems to be the worst, if a part of a document contains your personal data, when you are working on it and it crashes.
Full data includes all Basic and Enhanced data, and also turns on advanced diagnostic features that collect additional data from your device, such as system files or memory snapshots, which may unintentionally include parts of a document you were working on when a problem occurred. This information helps us further troubleshoot and fix problems. If an error report contains personal data, we won't use that information to identify, contact, or target advertising to you. This is the recommended option for the best Windows experience and the most effective troubleshooting.
My relevant point was : It's measuring activities and performance yes, it's not stealing your information as the user activity is also anonymous.
I don't see you making a relevant comment though.