Ubuntu is not the only Linux distribution. Slackware is great if you want an OS that literally only does what you tell it to. Ditto OpenBSD if you're even more paranoid about telemetry.

Granted, they aren't for beginners, but that's the sliding scale in action.

Which telemetry on macOS is not opt-in?

Looking at this script there are seems like many more vectors on Windows then macOS and Ubuntu.

It can be turned off. Not in Windows, only toned down a bit.