There's a reason "it does what it says on the tin" is generally seen as a positive aspect of a product.
When a product's naming and branding is well aligned with its actual utility, it builds trust with the customer. The customer doesn't feel like the seller is trying to pull a fast one on them.
Tesla chose their branding direction and Elon chooses to make his "optimistic" predictions that have made it sound like true self driving is right around the corner for years. That people take this impression away is no fault of anyone but those that put the impression out there in the first place.
This is simply a mischaracterization of the situation. No one who drives a Tesla thinks that the driver assist features are intended to or capable of autonomous driving.
The naming, whatever you may think of it, is massively overrided by the strongly worded warnings and instructions that are abundantly and repeatedly displayed to the driver, that effectively and unambiguously convey to the driver that they must be attentive while using the driver assist features.
When a product's naming and branding is well aligned with its actual utility, it builds trust with the customer. The customer doesn't feel like the seller is trying to pull a fast one on them.
Tesla chose their branding direction and Elon chooses to make his "optimistic" predictions that have made it sound like true self driving is right around the corner for years. That people take this impression away is no fault of anyone but those that put the impression out there in the first place.