I do not support this idea. The differences between the things they all group together under one umbrella is
wild - ads, usage reporting, automatic updates, and crash reporting are all
very different things and it's actively harmful to control all of them with a single switch.
At the very least, there should be two different switches - "ads" and "everything else".
If you don't want telemetry or crash reporting, that's fine - you may not care about helping the developers of an open-source project improve their software and that's your personal choice. Similarly, you may want to manually install security patches, while I want them to be automatically installed so I have one less thing to worry about.
There may even be some crazy person that wants ads. I don't, but I'm not going to try to take away their freedom to choose them, which is what this proposal would do - an all-or-nothing switch for non-essential network access.
Give me granularity. There's no (user-facing) reason not to.