I too have owned many cars with right or left blinker stalks and have accumulated about 2 years of driving in the USA over my lifetime. Generally I don't have a problem, but at least for me I know it can happen. The significant difference between the Merc and the Tesla is that you get neutral in the Merc and reverse in the Tesla.My view on this issue below:
I have owned a variety of left blinker cars (AMG, AUDI x 2, LR Discovery x 3, VW, Tesla) and right blinker cars (Commodore, Subaru x 2, Hyundai x 3, Suzuki) and cannot understand the issue mentioned above.
If you are incapable of remembering which side the indicator is on, how can you operate a vehicle in a LHD country? Or find the volume controls or cruise controls in an unfamiliar vehicle?
I personally feel that if you are so unaware of what you are doing when controlling a 2+ tonne bit of machinery then you shouldnt be operating one.
In addition, the Tesla stalks have a very distinct "movement" and it is almost impossible to accidentally operate them without realising whats happening. i.e. to go from a 3 blink press to full blinker it is a very solid movement required. Likewise moving into drive or reverse requires a similarly forceful movement.
Lasly, if you shift into reverse, the cameras come up and cover the whole screen. Impossible to not realise what is happening.
Can you honestly say you have NEVER put the wipers on to turn the corner even though you know that you are in a right stalk car (or vice versa). There are lots of motions involved in driving a car and lot of them don't take a fully conscious thought. Once I decide I want to put the blinker on I don't consciously think about moving my hand to the stalk and which way to push it.
I am at a disadvantage here since I don't have a Tesla yet to try this out on. Perhaps the reversing image coming up on the screen might be enough to warn you, but I suspect that since you aren't intending to reverse and are concentrating on other things like what's in front of you (which is where you think you are going), your brain might filter it out.
Your other comments don't seem to be relevant.
Accidents don't usually have a single cause, it is an accumulation of factors, if you remove one of the factors the accident doesn't happen.
Anyway, I didn't intend my first post to turn in to a back and forth debate. I found an email address for Tesla Australia so I think I will just send them an email with the concern and hope they can pass it to the appropriate engineers for consideration and I will retire from the debate (and wait patiently for my car).