It is just another symptom of the system that makes affordable housing rare, not the root issue.

Why do you think it would not be worse without the UN?

Do you think this is the only thing the UN does? Or that everything else it does does not matter?

Self-Hosting GitHub is available under the name “GitHub Enterprise”, but there is nothing stopping a smaller company from getting an “Enterprise” license. At my job we are running self-hosted GitHub for less than 50 developers.