>>3484905I think what he's referring to is just that candid cliche; "they aren't smiling for the camera, therefore it's art". People utilize this approach but don't get past it and so you end up getting an image of a confused person, or a straight-faced person, walking to work while the photographer tries to convince themselves that they just captured a meaningful moment.
If photography isn't just about the facial expression, what's it about? This is what people often fail to ask when they see street photography as just a free-balling alternative to formal portraits.