I do think "normies" care about the CPU is hot or not, but they do so indirectly, as the phone will start throttling the CPU when it reaches a certain temperature, so the phone will start feeling laggy.
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.
Haha, I have exactly the same problem with my iPhone 12 Mini too, except I use Waze and YouTube Music with CarPlay, and it only happens on hot summer days, although it was in the shadow.
My hack was to put the phone so I could aim one of the AC outlets straight at it, which solved the problem.