Chernobyl suffered from compounding of reactor and test design flaws and human error. Fukushima suffered from (retrospectively) insufficient risk assessments, which resulted in a design meeting a rare event beyond it design limit sooner than expected.*
I'm unaware of a human society, in fact any animal society, where politeness does not involve some degree of deference. So saying these accidents were caused by a culture of deference is essentially meaningless without some more "who, what, why, how" and importantly 'how much' and 'compared to what'.
From the IAEA report: "This common mode failure reached a scale considerably beyond that usually addressed in the assessment of BDBAs. [ed: beyond design basis accident]". https://www-pub.iaea.org/MTCD/Publications/PDF/AdditionalVol...
https://www.coursera.org/lecture/intercultural-communication...