Earlier quoted context omitted.
On addition some narrow alleyways are a bit dangerous —they are narrow and in the event of emergency they can find themselves blocked off (when fire escapes empty to them, as they usually do).
Tokyo seems to do just fine with innumerable tiny alleys that can only accommodate humans or the occasional bicycle. It’s all about balance.
How?
I love all those little shrines [0], for example. It's paradise for anyone who loves exploring nooks-and-crannies.