I believe though the authors of the websites should have control on how the contents are displayed, it's still more convenient if the raw contents or the conten

I believe though the authors of the websites should have control on how the contents are displayed, it's still more convenient if the raw contents or the contents following a specific standard of delivery is provided. And that's what I did for my website, by providing markdown source via git and web. You actually got RMS's point: There's no obligation for you to make a website for everyone, but you could provide more convenience and compatibility by not _only_ making a website which needs javascript enabled. It shouldn't be assumed that everyone favors javascript and likes to execute javascript code from everywhere. One may argue that would be easy to be scraped by bots. That's another issue.