Yes, all proprietary software vendors are stereotypical mustache twirling villains.
This is the kind of overheated rhetoric that causes people to tune out open source advocates.
Also I don't need open source software to see that vendors have tracking code. I also don't have to use their software. I have yet to hook a smart TV up to the internet and have zero intention of ever doing so. A lot of people hook up smart TVs to the Internet because it's the easiest path to get to the Netflix app. You think they are going to swap out the code on their TV even if it was a choice? That's delusional. It would be far easier for them to just plug in an Apple TV if privacy is a top concern - but sadly for most people privacy isn't a concern.
As for VR headsets they are such a niche case, other than us nerds it's not even on the mainstream radar. And once it gets to a point where it is more mainstream there will no doubt be companies like Apple making a big deal about Privacy being a key differentiator for them. So yeah, you might have a quicker path if everything was open source and you had the capability to do it yourself, but open source is hardly the ONLY path to get these results.