I remember when a weather app using your GPS to automatically change to your current location was controversial. Now we willingly subject ourselves to corporate spying at the OS level.
Why do you say they don't let you disable the telemetry for Windows 10? Honest question.
They also add new settings using Windows Update which you're not prompted about and which default to on, which would presumably then send information between when the update installs and when you realize it's there, even assuming you're diligent enough to notice it at all as most people obviously aren't.