economies of scale are "real" until their risks vastly outweigh the benefits - which always happens at some level of concentration.

Habitually embedding attenuation in any system we develop (social, political, financial etc) is likely the only generally applicable risk management strategy. The only one that does not require detailed, correct prior knowledge about a system and timely application

Detailed knowledge and just-in-time application is great in theory - its just not a real-life strategy of any kind...