Like if the keymap were designed: "first key left of space" is our primary prefix since it's the most convenient (thumb) modifier, then the physical mod swap would've had no effect, and given the dynamic nature of the underlying language you could even have it be changed in a single variable to have an effect on all the keybinds and all the docs
(also yet another illustration how arbitrary bad defaults can stick forever, like vim using HJKL instead of fully going home keys JKL; just because some ancient keyboard had left arrow on H)