Gotta love Tesla forums, they will defend anything the company does. Turning your neck is good exercise, the Tesla central machine has more important things to be working on.... Blind spot monitors aren't meant to be the sole decision maker on whether to move into a lane. They're a tool, along with your eyes, ears, mirrors, etc. Yes properly adjusted mirrors are good enough, but having BS monitors too is better and can save lives. We've all had a car or motorcycle appear out of nowhere and had a close call at some point. That's where the monitors shine, those 1 in 10000 cases.
The "Safest car in the world" should have these industry standard tools or a better alternative.