I think that's because people live in their own dimension. The struggling dimension is one where you want to reach out and feel less alone, it helps to walk together (which is why I've started my art project as a social page, and to force myself to go through with it :)). But notice that walking together is not the same as one helping another. It happens but it's the product of sharing and the witnessing that comes from it. Actually helping others cannot be done easily.