The world has displayed a lack of interest in privacy with regards to digital systems. Therefore Microsoft has chosen to enable features required for making the computer more personalized by default, but still allow users to opt-out.
Most other vendors don't even give this oppertunity when installing, but can only be done later via some deep-down config change.
If you are paranoid about your data privacy, please just use one of the many privacy focused OS's. In the end you will always be forced to trust something, or you might as well go off the grid in a third world country. Because thats really the only place complete privacy is realistic.