Disinterest, or even reduced interest in people or activities makes you less vulnerable and susceptible to criticism. This is attributed to such behaviour insinuating that one is ‘above’ or ‘superior’ to a given scenario, perhaps intimating that you have more interesting experiences regularly. However, if one looks a little deeper, it becomes clear that such conduct is in fact uncertainty and fear masquerading as superiority.
In general, a person living in a 21st century, first world country, encounters very little worthwhile fearing, yet fear persists. This is a case of instinct being enforced outside of its natural context. Given the present context, what is most fearsome is not the world around you, but the ramifications of humouring these misplaced survival impulses, for they make the end goal of surviving, less worthwhile attaining.