There could be a lot of free time in our lives. Except sometimes it is too fragmented and filled with distractions making it hard to use this time productively. Such free time could come in small chunks of waiting in line or for the bus, riding an elevator, etc
Being exposed to random and unrelated ideas can lead to more original ideas in one’s work and life. Connecting the unrelated ideas is also a known source of creative insight.
The notion of serendipity is a common occurrence throughout the history of scientific innovation.