In the case of Nvidia, Telemetry gets installed alongside the driver package. While you may — and should — customize the installation of the Nvidia driver so that only the bits that you require are installed, there is no option to disable the Telemetry components from being installed. These do get installed even if you only install the graphics driver itself in the custom installation dialog.
This starts with version 375.70
Come on, who told these companies it was alright to just suck stuff off your machine without consent? And a EULA isn’t consent!