They probably meant "the human world", cities, etc. For example in the subway, the warning for the closing of doors used to be only audio, now you can see more

They probably meant "the human world", cities, etc. For example in the subway, the warning for the closing of doors used to be only audio, now you can see more modern ones that have both audio and visual cues that doors are about to close. In the same way, when crossing at a traffic light, there used to be only visual cues. In some cities now you have places that also have audio cues for people that need it.