Where are you getting that from, that’s not on their site.

www.tesla.com/model3/design#overview

Scroll down to the feature add-ons.

Full Self-Driving Capability

$12,000 Your car will be able to drive itself almost anywhere with minimal driver intervention and will continuously improve

All functionality of Basic Autopilot and Enhanced Autopilot Autosteer on city streets Traffic Light and Stop Sign Control

***The currently enabled features require active driver supervision and do not make the vehicle autonomous. ***The activation and use of these features are dependent on achieving reliability far in excess of human drivers as demonstrated by billions of miles of experience, as well as regulatory approval, which may take longer in some jurisdictions. As these self-driving features evolve, your car will be continuously upgraded through over-the-air software updates.

I’ve highlighted the appropriate section for you.