Teslas are more expensive than the average car (hence might be driven more carefully), and autopilot is more likely to be enabled in predictable driving environments like highways.
I don't know where you get that idea from, when I'm out cycling it's generally the people in expensive cars that don't pay much attention.
Which is what it was designed for and which is a much easier problem to solve than inner-city driving.
Which IMO I feel like more self-driving companies should have focused on first to perfect their systems. We used feature phones before smartphones for a reason, hardware/software is best developed incrementally.