Regardless of facts about how much doctors actually care, he still perceives the world as one where almost nobody does. I'm glad he expressed himself as such because I feel the same way sometime, even though I know that most people try to fill their role in society well. It's like a special kind of loneliness that grows quick. I like how he describes the development of this loneliness. Once he put on its glasses, he thinks carelessness is everywhere, even in doctors who do care, so he develops existential hopelessness of some sort.