Hence the detailed explanation after "don't be rude". And "maintainers have final say" is 1) another otherwise-unwritten rule (it's true regardless), and 2) justifies banning repeat offenders when the maintainers don't have time to keep writing specific rules for them, and there's a vanishingly small chance they're not acting in bad faith.

Also, when people cause social issues, they should be reprimanded referencing specific parts of the CoC, and in most cases given warnings or opportunities to recover. For when the person causing the issue genuinely isn't aware what they're doing is wrong and can learn to be tolerable; and even when the person is completely bad faith, for unaware bystanders to learn what's right and wrong.

Diagnosed autistic people aren't the only ones who suffer from unwritten social cues. Also people from other cultures, e.g. where rudeness is considered more acceptable.