Whenever I hear or read these types of perspectives, the first thing that comes to my own mind is that perhaps it's quite subjective how an individual perceives and experiences the exclusions, when people are helpless in terms of others, or when we feel they are not able to understand. My automatic reaction and interpretation, for myself, is not "being thrown away". More that I do not click well with certain people and they are clueless about me, and often I am also not able to relate well and be really empathetic with certain kinds. Some of these can be immediate family members (for my my mom, for example, which is sad, but not unrealistic, IMO.

I personally would have felt it much more straightforward and honest from a T to say directly that they tried to understand me and help me, but it's just beyond their perception and world view. And not continue pushing both themselves and me to "work it out". Well, I left therapy each time when I felt we were hitting that stage (or when I felt I no longer needed it), but the Ts both had a very hard time letting go of me. I don't think it was particularly supportive, definitely not healing or honest. This relates to being direct in interpersonal interactions, which I much prefer as well, and how I started out as a younger person, but had to learn from experience that it is not always welcomed - learn the so called diplomatic type interactions as an adult. But my default is still directness (both giving and receiving) and all I can do is to practice it in my closest relationships. Will never work on a larger scale, IMO.

I had similar experience with family members in my youth - I disconnected from most of them pretty early (early childhood-adolescence) because there was just so little in common between us. For me, my dad was the only real exception. I also feel that it was/is much more effective and healthy for me to find my own people and establish relationships based on what was there between us (friends, colleagues etc), instead of focusing on and grieving what was missing. I know that this attitude is not something that everyone can just adopt automatically, just wanted to share my view and experience on the topic.

The homeless and otherwise dysfunctional, "discarded" populations of society is a different question in my mind, at least very distinct from my own life experience.