unfortunately the volume of regulations regarding automotive technology doesn't allow for this. if Toyota or any other manufacturer wants to make a chipless car, first the law makers have to allow them to.

I'm not aware of how you can do emissions monitoring through canbus (required) without chips. not sure how you can do rearview monitors (required) without chips. there are countless other things that are regulated that require chips. and competitor pressure for assisted driving technology like lane assist, blonde side monitoring, navigation/gps/etc all require chips.

the dream of going back to a chipless is a nice one imo, but they are just not legal.