HTTPS isn't a signifier of content quality, so mandating it would not be 'good' in any sense that's relevant to the community.
For the same reason Hacker News doesn't categorically ban articles behind a paywall, provided a workaround exists.
For the same reason Hacker News doesn't categorically ban articles behind a paywall, provided a workaround exists.
And as has been mentioned elsewhere, it would probably be a net negative for quality since potentially good articles would be banned.