This is what I thought of too when looking at the first few images. How can they "walk" in those places?. However, I believe not all of the examples were steep

This is what I thought of too when looking at the first few images. How can they "walk" in those places?. However, I believe not all of the examples were steep stepped or cobbled but had vehicular access and were level, and the article explains issues about access and ambulances etc - it would work out fine - arguably better in terms of human closeness.