Only because council policy at the time was to allow them to go to wrack and ruin when very few wanted to move out of these communities and set up petitions to stay (even though the councils had practically withdrawn maintenance and repairs so they could be put of their misery.
You should really see the gardens film documentary 'Gardens of Stone' and see the strong audience reaction from ex residents from all over Liverpool at how discraced they were at this policy, even none ex residence come to that.
I know you talk elsewhere about Thatcher's greed obsession for which we now pay the price. In communities such as these, even during her reign, that truly didn't exist, each had the same as their neighbour. Not many wanted the new houses with all mod cons and gardens to maintain and the facelessness that went with being behind your own fence or hedgerow.
I know you also talk elsewhere about fuel poverty. A number of these tenements still exist in the likes of Clubmoor, Wavertree, Upper Warwick st, Nelson st, St Anne street, Myrtle st and Copperas Hill (as pictured) and all are gated private communities which have been well incorporated into the 21st century with little bother and no one dying of the cold in the process. In fact I know of a number of people who paid good money to live in the ones that are not student based and visited one recently and very warm and comfortable they are too (though I really do appreciate how small the old back kitchens were now and how narrow the landings are - my rose tinted glasses did kick in as I always remembered them as being wider, but I was narrower too back then)
It's funny how these 5,6,7 high blocks are now back in vogue in the city centre and at what a price too.
The tower blocks are something different. Mis-managed. Isn't Beetham tower a glorified St. Georges Heights after all with security and car parking making it a difference. Take a look at view 146 and what was done with them.