They do not mean to degrade or stereotype. The individual variations within each race are so huge that racial groupings are difficult at best. I have been mistaken as Chinese, Filipino, Japanese and even half-white at different times. Of course, culture determines where and when a person feels invited to talk. But then, some people don't need or wait for an invitation.
People talk for many reasons, only one of which is to communicate information.
Talking is the activity that more than any other defines us as humans. From that perspective, we can understand why women and men love to talk. When nobody else is around, we even talk to ourselves. As a species, we just can't seem to stop talking. Some of them even talked to me while I was in there, and I was so ashamed.