The issue is the means of enforcement requires taking away other rights they shouldn't be able to.
What if I want to require (for anti-piracy reasons) that to use my software you must also give me complete access to your computer, all the data on it, and all your communications. You might say, "Well, if anyone is stupid enough to make that deal, let them." But it's easy to sugar coat what you're doing, especially with less technical users. I think it's better to say, "That's just not something you are allowed to do. It's trampling on rights more important than your anti-piracy rights."
In the same way, you cannot murder someone even if they agree to be murdered (an actual case in Germany).
Forgive me, but is Netflix asking for that?
As I understand it, Netflix wishes to authenticate the device, and DRM their content. I'm not aware of anything beyond that (but I'm also not paying attention. )
Now you may have used the example of what might happen, but then Netfix seems a strange example. Surely Apple and/or Google are more likely players in that example?
> What if I want to require (for anti-piracy reasons) that to use my software you must also give me complete access to your computer, all the data on it, and all your communications.
That's exactly what happens with anti-cheat kernel modules. As one might expect, ordinary people couldn't care less, as long as it works good enough.