Nope sorry but that's not true. The chipset always runs at full speed and has no power saving features or downclocking. That's why it gets slightly warm. But a fan is still massive overkill as the actual power consumpion never exceeds 10 watts.The X570 heat is caused by power delivery of the M2 NVME SSD's. Not by the actual chipset itself.
But assuming you have decent airflow in your case it's not a problem. I can't speak for other manufacturers but on my Gigabyte X570 there is chipset fan control setting in BIOS and you can make your own fan curve.
14:00 16:54
And also this: