I think when a LL falls for the sob stories, it is because they are a rookie and have not been burned hard enough. I used to fall for that myself a while ago, when I rented to low quality tenants. I was a Section 8 LL. Even with rent nearly 100% guaranteed, it was not worth the drama of a low-quality tenant.
There are reasons why tenants are low-quality, and it is their personal makeup, and their upbringing that is the cause. It is near impossible to change the attitudes.
I did sell (via a 1031 exchange) a rental I had in St Paul due to the political environment. Far too any politicians want to take away the profitability of landlording. They run a city into the ground, prohibit legitimate screening criteria, and then they blame the LL for bringing in crime. When the profit is gone, they blame the LL for not keeping up the property.
I am probably one of the the most profitable LLs around, for what I have invested. Increasing tenant quality is a game changer. With 24 tenants, I have not missed a rent payment since 2012, which is also my last eviction. I have had a very limited vacancy expense, last year I was vacant for two weeks.