I am a fan of electric cars but why no one seems to care about SW and HW inside, especially for always-on, always-connected HW? I've heard they had to SSH into

I am a fan of electric cars but why no one seems to care about SW and HW inside, especially for always-on, always-connected HW? I've heard they had to SSH into customers machines to fix something. And that one day they kept Kubernetes cluster insecure and let someone run mining on it. I won't trust the software - I need a device where I can at least set up the firewall. But an open firmware would be even better. But it won't happen because of how these industries work. That is a pity because it's up to you how you secure your home pc. But it's up to manufacturer to secure your connected devices and they are not always doing maximum. Over time, there will be many connected cars and IoT devices with outdated, broken, wrongly-configured firmware (look at routers nowadays). And don't tell me you can remotely control driving servos in such cars. Because if you can, a hacker can become a serial killer or a hitman soon...