Do you mean to say that the Model 3 is 100% reliant on the camera based rain sense wipers?
Not sure your question.
Model S, X and 3 all are the same.
Supposedly early Model S/X had rain sensors and Tesla removed them in favor of camera neural net based implementation.
But you can use fixed speed on all of them that does not use the camera or use a fixed delay.
The “auto” relies only on Camera/Neural Net on all new Tesla’s.
Only thing different is you have a physical control on S/X, which is a plus.