Let's not forget that the only reason states exist is to serve those within them. If that state should fail to serve its people sufficiently, it's been common throughout history that they've been dismantled by the people.

You are correct about natural rights. They are fought for. Many rights, such as workers' rights, were strongly fought for and founded on blood (pretty much all of them in fact). However, when talking about rights, one remember the original meaning of the word: that which is morally good or honorable. The legal entitlement is preceded by the philosophical definition. In a just society legal rights should reflect moral rights as closely as possible.

Housing is necessary for life, and so depriving an individual of housing when housing is unutilized is equatable to murder, an injustice. This is why the post communicates that housing is a human right.