Contact with a 140 F surface is hot enough to cause 2nd degree burns in 3 seconds. Touching a PCB that hot would cause immediate pain.
The air in your car is not a surface, and multiple mechanisms protect you from immediate danger in a hot-air environment.
Didn't realize that my car has no surfaces in it. Amazing.
Dude, just give it a rest. Your hypothesis, while not crazy, doesn't have any factual basis to it.