The HTML documentation sitting in my /usr/share/doc does not make it part of the web.
The output from man -H is not part of the web, no matter what its mime type is.
HTML is not the same as the web.
The output from man -H is not part of the web, no matter what its mime type is.
HTML is not the same as the web.
Content-Type: text/html seems to disagree with your assertion.