The reason it's called that is so when you're buying the car, you can read "full self driving", the salesman can call it "full self driving", and then you can get excited and think you're getting full self driving and pay stupid amounts of money for an iPhone on wheels.
Who exactly are you describing here? Like someone who's been living under a rock for the past 5+ years and thinks cars just drive themselves now, but who also has $50k-$100k to drop on a car and also doesn't do any research beforehand? I think you're blowing this way out of proportion.
All these systems are flawed to some extent as nobody has cracked the code to L5 automation. There is some danger to it but there are many dangers to driving and this eliminates some of them. People have died in Teslas but many more have died in every other production vehicle that has ever existed. If this guy did the samr thing in a Toyota Camry, do you think we'd even be talking about it right now? These systems can only get better with a lot of real-world usage.
I totally get where the other person is coming from. These arguments are so tired and meaningless at this point. If you want Musk to go away, then stop bringing him up at every turn because it just makes people sound like bizzaro-world Musk fans as they hate the guy but can't stop talking about him and following his every move. Some of us want to discuss and debate the actual technology and Musk had nothing to do with developing it.