From the archived page you linked to:
Build upon Enhanced Autopilot and order Full Self-Driving Capability on your Tesla. This doubles the number of active cameras from four to eight, enabling full self-driving in almost all circumstances, [...]
Please note that Self-Driving functionality is dependent upon extensive software validation and regulatory approval, which may vary widely by jurisdiction.
Combined with Elon's claim that by 2017 a Tesla would drive from L.A. to New York with no human intervention and combined with the misleading video (using software that would never be available to the public) it sure seemed like Tesla had already solved FSD and the only hurdles left were validation and regulatory approval. I see nothing here for them to hide behind.
Elon bet the ranch they would solve FSD soon enough so this misleading information wouldn't matter. He lost that bet. They may have had good intentions in their hearts but they intentionally deceived and misled people. They knew it wasn't ready yet. They knew there were much bigger hurdles than just validation and regulatory approval. They knew the video didn't depict software that would ever be made available to the public.