A poor trades person blames the environment and their tools for poor craftsmanship, never their skills or the fact that they unveiled an embarrassing side of themselves - first principle of the rationale for using Johari's Window. Hide the part of yourself you don't want exposed to protect yourself. When you reveal the hidden side that is unknown to others, you may feel the exposing party is duplicitous and worthy of their own pain (revenge and vindication) or disclosure.
I do not understand why Kemi Badennoch is saying that the curriculum doesn't need decolonising. I do not hear this rhetoric from academics or leaders in schools. What I hear is a call for history, specifically Black African (not the Egyptians) History, being debated and taught with integrity and equity in ALL schools, as it currently is not. Point me towards primary and secondary schools across all counties, outside of London, Birmingham and Bristol, where it is.