Why do people call roosters live alarm clock gods please help

The ancestors of domestic chickens are originally jungle fowls, and they are all birds. Every breeding season, male birds will show off their wooing to female birds with their bright feathers and chirps. Roosters are no exception. It is necessary to show off courtship to hens with beautiful feathers and loud crows in order to find mates, mate and propagate seeds. From this point of view, the crows of roosters are definitely not for announcing to other creatures (including humans), but for Its ancestors have long had the habit of going out to look for food and mates before dawn. Over time, they developed the instinct to cry in the early morning.