Journalism is paid for by ads, mostly. For online journalism, unless people click there is no money to pay the producers. Hence clickbait. This is a problem but there are worse problems.
I've seen many cases where mods revert an informative title in favor of a less informative one. Also, the idea that the title of a submission should match the title of the resulting article is quite silly, since often the article is written for a different audience and the informed HN submitter can sometimes craft a title that better summarizes to HN readers why the story is interesting / worth reading / controversial.