If housing is a 'right' as you are implying then its a societal responsibility to pay for it - not just one subset of people's responsibility.Farmers and grocers aren't required to take installment payments if someone is having trouble paying,  Neither are doctors and nurses required to provide their services under such terms.   

Detectives spoke with doctors from [MedStar] Washington Hospital Center who advised that [the victim] was most likely not going to survive this incident," officers wrote in court documents.https://wjla.com/news/local/po...

I am currently a w2 doctor with a house in town A. 

Anyone who wants to move in will just get a letter from a doctor stating that their animal is an Emotional Support Animal and there is nothing you can do about it.Increase the rent, increase the security deposit, and advertise pets are OK.

There is a BP Blog about renting to College students with a lady who does it professionally at the Medical Schools in CA, where the students plan to work 24/7 for seven or more years before they Intern in order to be a Doctor of some sort and pay off their insane Student Loans.

He went to the doctor.

Require doctor's prescription and current vaccination records.

I too, agree with the majority that the cost of higher education (if I boil it all down) is inflated and not worth it when looking at it on a spreadsheet of assets and liabilities unless you're going for a specific degree to be a doctor or a lawyer or an engineer.  

My suspicion is this tenant went to a doctor or counselor, received a prescription, and then never returned for treatment.

Except in rare scenarios like Medical Doctors and attorneys.