Author of [3] here, you are right, I do skip the what & why, on purpose. I think there a far better places to learn about the whole spyware / telemetry and privacy topic, even better than the original article. [3] is made for admins which already know what they want (and why) to help them kickstart their own setup scripts. They are advised to read the scripts themselves instead of an inaccurate explanation.

I do not intend to sell you the project. (Sell in the sense of talking you into using it. Either it's what you are looking for or you need something different. And I will not waste your valuable time if you need something different.)

[3]: https://github.com/W4RH4WK/Debloat-Windows-10