Perhaps a bothersome aspect of title changes is we are not told the reason(s) behind the edits. For example, if an HN reader is emailing the moderator and asking them to change a title, other readers might want to know that, along with knowing what was the original title. Whereas if it is a small correction, like adding "(2019)" to the end, perhaps few readers would really care. Sometimes we can decipher the reason, other times not.
Another bothersome aspect might be the arbitrtary applicaton of title changes. Some titles get changed based on some discernible criteria while others do not despite meeting the same criteria.
It is quite common for HN titles that exactly match the submitted web page's <title> to be subsequently changed to something else after submission, even though HN guidelines state that titles should not be editorialised.