Normies care about the fact that it's uncomfortably warm to hold, not whether the CPU is hot or not.
If you've ever tried to play a game on the iPhone/doing something else CPU/GPU heavy while outside in the sun on a hot day, you'll know what I mean, the performance is much worse.
Once I've had it outright shut down and show a black screen with a pretty thermometer, how's that for "performance is much worse"? ;)
(to be fair it was a spectacularly hot and sunny day, definitely in the "out of spec" range)
good excuse to put down the phone and enjoy the sun :)
Excessive heat, especially in humid regions can be daunting.
My hack was to put the phone so I could aim one of the AC outlets straight at it, which solved the problem.