I wouldnt say that the fan is useless on Pro model. I play Path of Exile, American truck simulator so a fan is much needed. Also sometimes i download entire playlists from Youtube, then convert them to mp3. So converting 6 videos at once also requires a fan
Had to be pretty hot. I was recording almost an hour long video 4k60 fps in direct sunlight on a hot summer day with my 12 pro max. Phone was super hot, hard to hold, screen brightness went completely off but it didnt stop recording.