My own sense is that the acquisition of self knowledge has been made difficult by the modern world. More and more human beings live in vast urban environments, surrounded by other human beings and the creations of human beings. The natural world, the traditional source of self-awareness, is increasingly absent.
Michael Crichton suggests that gaining self-knowledge has become more challenging in contemporary society, largely due to the overwhelming presence of urban life. In cities, individuals are constantly surrounded by people and human-made structures, which can detract from personal reflection and understanding.
With nature becoming less accessible, the traditional means of connecting with oneself are diminished. Crichton implies that the absence of natural environments, which have historically provided insight into human existence and identity, leads to a struggle in achieving true self-awareness amidst the complexities of modern living.