I have 16 cores at 100% right now as I type this and there's no fan noise at all. I'm parsing 10,000+ php files and modifying them for an upgrade. I've done this before and the Mac makes a lot of noise.
MBP is good but it's not all there is. This is a AMD Ryzen 7 5700U with a dual fan setup. It's got performance and efficiency cores similar to the newer Apple chips.
Just throwing it out there! I hope more people support great laptops like this one.
And the Macbook Air doesn't even have a fan.
I also spent about $2,500 less than the option with 64GB of RAM from Apple.
On that note, a lot of laptops have goofy fan curves. In theory, you want the fan to move just enough air that the CPU doesn't throttle, since the rate of heat transfer is proportional to the heatsink-to-air temperature difference.
You can build a suitably quiet PC. Be Quiet power supply, case, fans and cooler. Job done. They run very quiet. I had a 125W TDP CPU in one of them and you could barely hear it under load.