Isn't the conversation about using Unicode variables as opposed to ASCII variables and how they are useful when implementing equations from papers and textbooks

Isn't the conversation about using Unicode variables as opposed to ASCII variables and how they are useful when implementing equations from papers and textbooks? How is spherical coordinates not being as useful as cartesian coordinates relevant at all (not that I agree with this opinion)? There are tons and tons of other equations where Unicode letters are useful and the specifics of spherical vs cartesian is not at all relevant to the usefulness of Unicode letters.