You either didn't read what I wrote, or are homing in on the things that are ambiguous vs the things that aren't. (or I'm just a bad writer). One thing is not ambiguous:
The intent, as stated by one of the primary authors of the HTTP specification has "no semantic meaning" and "is never useful to do so".
You can do something different and assign meaning to the body, but it's no longer HTTP. So you are correct, it's not disallowed, just pointless. I'd also recommend you read the latest version of the HTTP spec. It's a bit more direct about this.
You can disagree with the authors of the HTTP spec of course, but I'm not interested in having that argument with you.
The intent, as stated by one of the primary authors of the HTTP specification has "no semantic meaning" and "is never useful to do so".
You can do something different and assign meaning to the body, but it's no longer HTTP. So you are correct, it's not disallowed, just pointless. I'd also recommend you read the latest version of the HTTP spec. It's a bit more direct about this.
You can disagree with the authors of the HTTP spec of course, but I'm not interested in having that argument with you.