However, it’s out there- and you have no idea where, so there’s not really a moral or feasible way to get rid of it everywhere. (Please don’t nuke the world just to clean your rep.)
Maybe commenters face threats to safety. Maybe commenters didn’t think AI companies profiting off of their non-commercial conversations would ever exist and wouldn’t have put data out there if that was disclosed ahead of time.
Corporations have an unlimited right to bully and threaten to take down embarrassing content and hide their mistakes, they have greatly enhanced leverage over copyright enforcement compared to individuals, but then if individuals do a much less egregious thing to try and take down their content they don’t even get paid for it’s immoral.
This community financially benefits YCombinator and its portfolio companies. Without our contributions, readership, and comments, their ability to hire and recruit founders is diminished. They don’t provide a delete button for profit-motivated reasons, and privacy laws like GDPR guard against that.
(As you might guess, I am personally quite against HN’s policy forbidding most forms of content deletion. Their policy and solution involving manual modifications via the moderation team makes no sense - every other social media platform lets you delete your content)