That comes across as hyperbole. People commenting on the internet are not the cause of persistent homelessness.
I lived on the streets for a while when I was a teen. My experience was almost no one wanted to stay there forever. The only people that do are crazy or totally given up on life.
Therefore you have two homeless problems:
1. Crazy people or drug addicts that have no hope.
2. People who are in financial hardships.
Almost all these stories are about #1, not #2. #2 is solved with many social programs. #1 exists because the state can't house crazy people in asylums any more.
Therefore, the homeless problem will never be solved for #1 again because our society can't handle asylums.
People commenting on the internet are not the issue.