RE: “diverse situations of cohabitation [are] driven by the need to regulate economic aspects among persons, as for instance to assure medical care.”
Well, that COULD mean ( not sure, but just giving Pope Francis the benefit of the doubt ) that as a matter of civil law, he recognizes that such unions (note the quotes) may be a way for Catholics to recognize the reality of a secular society without supporting same sex marriage.
The same principle I guess, applies to divorce. The Catholic Church FROWNS upon it, but recognizes that in a secular society, it may be made legal.