I don't. Once there are more than a certain number of comments, there's a diminishing value to additional ones because they start restating what's already been said in other comments.

You are not required to read every comment on a HN submission.

Check for links using ctr F or something and yes no one can read all the knowledge in the world nor all the books in the world. We just read what we can

Scan for high signal or value comments, read a subthread, collapse the subthread, as a "read" indicator. HN stores state in this regard for you, if logged in.