The bell curve of PC cooling opinions is brutal. On the far left and right, we have the chill 0.1% who just use whatever fan came with their case and sleep peacefully at night. Moving inward to the 2% and 14%, we find slightly more opinionated but still reasonable humans.
Then there's the sweaty 34% in the middle screaming "NO! I NEED A PUSH PULL AIO!" while literally crying tears of thermal paste. These are the people who spend more time optimizing their cooling setup than actually using their computer.
For the uninitiated, a push-pull AIO (All-In-One) liquid cooling setup uses fans on both sides of a radiator—because apparently one set of fans wasn't enough anxiety about potential leaks destroying your $3000 gaming rig.