The idea of white fragility is patronizing to non-white people. By acknowledging white fragility, white people can become patronizing and hyper-aware of their interactions with other people, which only perpetuates differences and race relations.
Unpacking the biases that white people have about race takes a lifetime.
Understanding white fragility alone will not facilitate the end of racism. The education system in most countries teaches implicit white supremacy, and unraveling those themes takes much more than open dialogue and understanding white fragility.
It will take policy change and international shifts in how humans view each other and themselves.
White fragility promotes racism by separating white people further from non-whites and making dialogue between races something that people fear instead of welcome.