That's the same for your alarm clock, your video game console, your TV, and maybe even your fridge. All these things run only the software that the vendor allow

That's the same for your alarm clock, your video game console, your TV, and maybe even your fridge. All these things run only the software that the vendor allows you to run. Why don't people complain that they can't install Linux on their camera? However - I think it's different for cars, which are often brought up as a comparison but can in fact be customized in many ways.