Some people will turn to biphasic sleep schedules because they feel like it’s productive. For some, their biphasic life usually consists of one long sleep session, along with a shorter nap during the day. They may feel like this is the natural way to do things and look at babies and nature as an example.
Some people feel like the biphasic sleep schedule is beneficial for their productivity. For example, someone may sleep for six hours, which is enough for them to feel energetic throughout a chunk of the day. Then, as they start to drag a little, they take a power nap for half an hour, which can restore how they feel.
There is some truth to the idea that having a biphasic or polyphasic sleep schedule can be more natural. In fact, making most people work on a monophasic sleep schedule is something that’s relatively new as far as society is concerned. Before the modern 9-5 job, and even before the industrial period many people would sleep in shifts.
Obviously, just because people used to do something a certain way doesn’t mean it’s better. However, when people’s sleep patterns were artificially changed due to society, it makes the case that biphasic or polyphasic sleeping may be better.