Yeah, I have a problem with this concept lol
You'll never be fully secure in general. There is a reason hackers and security experts play a neverending game of catch up.
"don't fool yourself into thinking action X made you secure and action X may well introduce other failure points."
Well yeah...you need to understand what you're doing. I agree with this general line of thinking, of course. Overconfidence is never good. I'd just think of it as another line of defense with it's own nuances and a set of pros /cons rather than a blanket defense mechanism. You might remember I don't like advertising/marketing, and a lot of.defense mechanisms are advertised and marketed as being super secure and almost omnipotent, when in reality they aren't
Random tangent: back when Microsoft went from Windows xp to win 7 it was a huge step up for security in consumer OS, since in xp any processes could be run by any user as a system level process.
Win 7 employed windows nt permission level system, and suddenly millions of viruses and malware became obsolete. A lot of people suddenly thought they could get away without anti-virus software.... Oh boy was that a mistake. Or Mac users who claimed they couldn't get viruses or malware... it was even a selling point at one time. While of course it was bullshit. The new Macos was always based on Unix and while nix like systems always had robust permission control, they weren't exactly impenetrable.
So I guess my point is, this doesn't mean you should just let your guard down. Now I agree that there's definitely diminishing returns past a certain point, but just doing things like disabling your location/wifi and using VPN can be a huge boost to your privacy.
I'm struggling with a good metaphor so here is a meh one. Let's say you walk in your shoes on the beach and you get sand inside. You say why wear shoes at all then. You take them off and then cut your feet on something sharp that you didn't see.
"With regard to the podcast, before I heard it I would never have even thought about the car manufacturer (so we need to also consider the dealership????) having a privacy policy, actually collecting personal information or sharing/selling that information. Certainly not to the extent they seem to be both able to and so probably are doing (or will if it adds to be bottom line).
"
That's a good point. But lawyers usually smell class action lawsuits from a mile away, I bet privacy issues will be raised among car makers.
" The collection of data itself allowed the researchers to work backwards, a bit like any good detective or Sherlock Holmes would, to identify the "culprit". "
Imo that's because data isn't exactly uniform. Different sets of data require different deanonymizing. If you for example see the data anonymously but the data is about your five best friends, you'll easily identify them. This is also how I dissect fake reviews and shills

This is how orgs and providers also catch people on here writing reviews, things like patterns and details matter.
I guess I just don't get how car software privacy issues evolve into "your burner is useless". You always are susceptible. You could use ten different phones and be super secure but your SO hires a private eye to follow you and now you're cooked. Or she puts a GPS tracker on your car without you knowing. There are indeed many places where you can get blindsided with today's technology. Hell... many a crypto thiefs got burned because they used same vpn for their crypto wallets as their regular personal accounts online.