Completely agree.
I don't have my Model 3 yet, but I drove a friends P3D for a weekend. Incredible car!
I read through the whole owners manual and came to this conclusion myself when running though possible scenarios in my head.
My friend and I discussed this setting and think creep off is the reason for so many unintended acceleration events.
We have a tight garage. My wife will be primarily driving this car, has never driven manual transmission, and is not used to the quick acceleration of electric vehicles. I drive auto/stick and love the quick acceleration/regen. Having to feather the accelerator to pull into a tight space seems like a recipe to launch into the wall. Also, if the car is sitting there not moving, but in gear, she may accidentally press the accelerator and launch. With creep on, when foot is not on the brake the car begins to move, so you know right away you are in gear. I believe your foot should be on the brake when not moving, or put the car in park. Why risk it? With creep off, and in gear, you can also coast backwards by accident. For me, the potential for disaster far outweigh the benefits of one pedal driving. So creep will be ON for our car.