We discount how much the concept of “understanding” is required in visual perception. We don’t just see shapes we have a complete understanding of what we’re seeing.
I might see a big rectangle flopping in the lane in front of me. I can immediately ascertain whether it’s a piece of tumbling plywood, or foam based on movement characteristics, color, apparently size, etc. I can then use that understanding to decide what evasive actions are required.
A Tesla it seems has absolutely zero of this capability.