What they meant is that it is not possible to fix it without replacing the hardware.

I see. But replacing the hardware would still be very much in the purview of "Tesla's problem" if you think they are a car manufacturer.

Yes, but it is unpatchable for any currently existing cars on the road, I believe that's the point they were trying to articulate (though not super well).

And yeah, you are correct, Tesla can close up that exploit in their newer hardware revisions.

Changing hardware would mean a recall and this doesn’t seem to warrant it.

But how much time until the hardware is changed? And all the current models?