If you read the thread you would see that obviously we are not talking about mass production cars. Obviously those are superior to horses.
We are specifically talking about people who signed up to be a beta tester.
FSD is not a rational choice over the alternative and its adoption in no way resembles the adoption of cars. The analogy is bunk. But I won't keep beating a dead horse here, I was just trying to explain why it doesn't IMO make sense.