“Any car” is perhaps too strong a claim. If it is Toyota/Lexus, I will say that I don’t think my 2009 Camry has this issue. I am quite sure that the fourth-generation Hilux my brother has does not.
I think they mean any car that can't be trivially defeated by shimming the door lock and plugging into the obd2 to program a new key.
There's a certain year for each car where it's guaranteed to be untrue, and same for each mfg. I don't know if it's 2015 or 2010 or 2005 but I would imagine back around 2000 the vast majority of cars can't be remotely hacked.
I've been telling people that 2006 is peak car for at least 5 years and almost everyone thinks I'm crazy but I just get more convinced ever year.