Chickens have been domesticated for thousands of years, and for the last 150+ years, have been incubated artificially.
Only a few "modern" birds still have the brooding instinct. Hatcheries have pretty much bred this trait out of most of their birds. If a hen goes broody, she's sitting, not laying, and this is not profitable to either the hatchery nor the commercial hen houses. A few rare birds surprisingly, still go broody, in spite of this. Some breeds have maintained a higher level of predictable broodiness. Old line, heritage fowl lines often do go broody, as this is a trait that is desirable for self-sustaining flocks.