XZise added a comment.
I think there is a misunderstanding. As I understand it Parsoid is used to convert wikitext into HTML and back. But pywikibot works almost entirely on wikitext so there is no need for Parsoid (or RESTBase) to convert it into HTML. At the moment it is just reading the wikitext (and mwparserfromhell/mwlib are parsing that wikitext) and @jayvdb suggested that someone actually writes JSON content into the page (which would act like wikitext and can be parsed by Python without external libraries). Using HTML would have similar problems like mwpfh/mwlib as we'd need to parse the HTML which could in fact be more problematic.
TASK DETAIL https://phabricator.wikimedia.org/T95142
REPLY HANDLER ACTIONS Reply to comment or attach files, or !close, !claim, !unsubscribe or !assign <username>.
EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/
To: XZise Cc: Krenair, gerritbot, XZise, Ricordisamoa, jayvdb, Aklapper, pywikipedia-bugs