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Times changed. Historical names did not.

"many of the early RFCs were actual Requests for Comments and were titled as such to avoid sounding too declarative and to encourage discussion.[8][9] The RFC leaves questions open and is written in a less formal style. This less formal style is now typical of Internet Draft documents, the precursor step before being approved as an RFC." https://en.wikipedia.org/wiki/Request_for_Comments

RFCs can be titled Architecture Decision Records (ADRs) or policies once they are accepted.

Historical precedent. They assigned a grad student to write up the notes; he wasn't sure he had got everything, so he titled it an RFC.

At this point, as we close in on 10,000 final-stage documents, it's better to pretend that "RFC" is just a name, not an acronym.