Correct me if I am wrong (it does happen), but I have seen titles edited for clarity regularly on HN.

Also, many titles are context sensitive. For example, if you're reading the title on the Quill website, chances are you already know what Quill is - or do you? When you copy the title verbatim to something like HN, the context is completely lost to anyone who doesn't already know what Quill is. In other words matching the title doesn't benefit anyone when the title is meaningless without context.

That may be nonsense when the title on the original site has a context that is the site.

I still dont get why people dislike original titles :/

Well the context in HN frontpage is much lower than in the site, so I guess your granparent was trying to correct that.

Because they’re routinely insipid.