The key use is for mental chunking, to help you grasp what complex software does.
By naming a small function according to its outcome/overall purpose, you reduce the amount of stuff you need to mentally juggle.
It's one of the many tools available to divide and conquer complexity.
Same way as a TV is full of complex stuff, but you press on, and plug into the wall plus an aerial, hdmi and WiFi. You don't talk about how the inside works to make higher level discussions possible