[radlad]

I wonder if they were concerned someone would use the data to make a decision about leaving a living creature in the vehicle.

[mirkules]

Now that I think back, I believe you are correct. The decision was based on making a previously-unavailable feature available, which meant people could potentially (be irresponsible and) leave pets/children in the vehicle while relying on an inaccurate sensor, which could open them up to lawsuits.

[PvtGleb]

or medications or food. I can totally understand the legal liability angle 5° F is not a small margin of error.