Well, if they are going to present it that uncharitably then yes, people would walk out. Cars with basic ADAS have been selling just fine, and their ".* assist" features have been sold by dealerships just fine. This just slots into the same category. "Manages your steering on long straight stretches of highways" is not a hard thing to convey.
What you said would be the case if they had the baggage of "full self driving" marketing over 10 years.