Correct, but "middle powers should have outside options in every critical area so no one has leverage over them" can easily lead to "no great power depends on you". Which, eg, guarantees access to frontier AI or defense? Interlocking dependence can be > "sovereign" non-dependence
My working hypothesis: Carney’s ideal is what you might call “managed multipolarity”—less American predominance, more influence for Europe and middle powers, and a bigger role for mediating international institutions.
It’s a world that would suit his instincts and experience. His speculating here about several reserve currencies fits the picture.
One must consider that Carney may welcome diminished American influence as much as he is preparing for it.