VPN Deals: Lifetime license for $16, monthly plans at $1 & more It ensures that your Mac being a MacBook, MacBook Pro or even a Mac Pro can function with decent capabilities while maintaining stability and safe operating temperatures. As mentioned, Apple does its homework when it comes to what fans should run at what speeds for the amount of heat and power being produced and used. If you are one to leave well enough alone, then this is not something you'd want to delve in to.
You can take more direct control over your Mac's fan speeds with the Macs Fan Control app! However, sometimes you may wish to forego the quiet for cool. And they do a pretty decent job of it too. The goal for Apple is to give you the best possible performance while keeping the system as quiet as possible all whilst using the least amount of power.
Apple takes great strides to ensure that your Mac thermals run well within the hardware specifications automatically without consumer intervention.