The envelope is expanded so you're able to get yourself in a worse situation.
Thank you for spelling out the crux of an argument against fast cars made by the general public - if a car is fast(-er), it must be more dangerous.
Allow me to retort - hogwash!
Better handling cars, with a wider performance envelope (performance tires, larger non-facing brakes, balanced handling, track-mode TC, etc), are fundamentally safer than a shitbox on wheels.
Why?
Because, all things being equal, I will be able to avoid an accident with an emergency lance change, braking, or accelerating out of trouble better than a shitbox. All the time, every-time.
And so will the Tesla autopilot (for those who panic, or don't know how to react in an emergency) - autopilot will save your ass more effectively in a better handling car in a marginal situation where it would only mange to slow down before hittign something. All the time, every-time.
Oh, but wait a second, a Ralph Nader clone would retort, if you KNOW you have a better car, you will enjoy it more, and drive faster, and THAT extra speed might make you less safe !??
$@#%^ yeah!
That's the point of paying for a quality performance car - I can have more fun driving it, and it will still be safer and more capable of avoiding accidents 90+% of the time.
Unless the driver is thoroughly incompetent, drunk, or drives like a d%ick.
In the above three cases, the vehicle he/she is driving does not matter. That person will find a way to get into an accident in any car, sooner or later.
If you still disagree and think "speed kills", then please act on your conviction and run, don't walk, to trade your Tesla in for a slow(-er) and thus allegedly safe(-er) Nissan Leaf.
Cheers!
a