"− (U+2212) is a minus sign instead of a dash"

This is technically true, but the character in the other version is a hyphen instead of a dash (though given the absences of dashes in ASCII, one, two, or three ASCII hyphens are often used in place of dashes in environments constrained to ASCII.)

And while AI watermarking and fingerprinting is real, using typographically-correct Unicode instead of base ASCII isn't really it (though I guess anything that transforms text in a way which reduces variety like this does will make some of it less effective.)