As far as we, the general public, know for certain, telemetry is used to gather usability and preferences data, and bugs.
You can avoid using their software if you are concerned about your privacy, that's totally legitimate, You can also warn others about it, if you wish so and believe that it is an important cause. I'll walk most of that walk with you. But I believe you have no justification for your accusation.
https://arstechnica.com/information-technology/2017/04/micro...
This suggests it is used for advertisements.
Windows is monetizing Telemetry data, which does have meaning and value, even for people that never leave chrome.