Tesla’s existence itself was never realistic nor achievable, from the very start, a point that the author makes. Also, the goal isn’t impossible; in fact, the goal is close to their current ramp rate. Improbable is not a synonym for impossible, no matter how common that misunderstanding is.
As far as safety and health, I have seen no objective evidence that Tesla is worse than the industry standard range, although certainly they can improve. Media sensationalist coverage of anecdotes doesn’t count as objective evidence of being worse than the industry overall. Admittedly, this is a low bar.