The problem is not necessarily that the narcissist is other-focused, but that the people they prey on are. Unfortunately for us and for society, people do put up with narcissistic abuse, some do forever, some don’t understand they have options, some, as with those in some domestic abuse situations, don’t have viable choices. In practice “everyone” does not eventually leave the narcissist. Unempowered people do and have put up with the abuse. Even if they “catch on,” and don’t want any part of it we have built a society where they often don’t have good options for leaving safely. We certainly can change that, but not with armchair psychology.