Didn't MS Word even have a "export as HTML" option? I feel like I might have used that initially to build the first version of my CounterStrike clan's website.
IIRC this site was made in Word: https://web.archive.org/web/20060414015434/http://easternsho... (on mobile, can't look at source to verify)
it allows to zoom to perfectly readable size, no half screen taken by "use the app" with tiny close button, no social share floaters overlapping part of the text, no functionality removed for mobile, ...