Indifference is a disease

At the end of Matt Haig’s book, The Humans, about an alien who appropriates a human body and learns to enjoy living among us, there is a chapter dedicated to “advice for a human”.

My favorite is number 86:

To like something is to insult it. Love it or hate it. Be passionate. As civilisation advances, so does indifference. It is a disease. Immunize yourself with art. And love.

What does indifference look like? I think it looks like binge watching, mcmansions, designer jeans, snapchat, self expression and the radio.