I live on the West coast, my Mom lives back East. I can't add another tenant in my apartment and even if I could, my Mom didn't want to upend "her life" to move to a place she has no history, roots, or connections.
She wanted to be near her sisters, of whom she wouldn't accept any help. She is proud and maybe too proud in that regard that she'd rather suffer in silence and not let anyone know. I helped pay her bills for a decade before she became homeless, at that time nobody else, my brothers for instance, offered her any assistance.
Additionally she wouldn't tell family about her situation and wouldn't allow me to. A few years ago I broke down on a phone call with her sister (my aunt) and explained everything. My mom didn't talk to me for a while as a result, saying her situation "wasn't anyone else's business!". But my aunt said she'd help, she said "I could give her $500, but that's all". I had been giving her $500+ per month for years by this point.
There are other complexities that were involved. But I understand your point.