Then what does this flashing arrow on the back of the vehicle mean?
https://trafficsafetyzone.com/product/magnetic-led-direction...
or this which looks a lot more like the Mini indicator:
https://www.duluthnewstribune.com/business/2304413-red-light...
Of course you can work it out with context and time, but are you sure your reflexes can work it all out quickly?