They don't know the page. In the case of this site it probably doesn't matter, but which page you're looking at is always going to be more interesting and informative than which site you looked at.

When the prosecutor is looking through your internet records and they see 50 wikipedia hits in some relevant time period, they're going to be upset that https exists.

only the destination IP. TLS encryption is inside tcp and around the http protocol.

You don’t need to copy and paste your reply everywhere it’s relevant on HN. Even us flea brains can carry your remarks in our head and apply them to similar comments.

And, unless you setup an appropriate DNS server and the default from your ISP, then they also know that you looked up the site's hostname(s).