The benefits of having a neutral, bookish (to use pg's old word) front page are so priced-in to everyone's experience of HN that people assume it just happens. Au contraire! It is laboriously maintained with daily effort. The default of homo internetus, especially at scale, is clickbait and outrage. That's what the arrow of entropy points to, so if we stopped putting energy into maintaining order here, it would quickly revert.
HN's quality, such as it is, very much includes "selectively altering an author or publisher's chosen headline" - publishers and authors (and headline specialists, at media sites) are incentivized to take advantage of the default dynamics to get attention. It's their job to sex up their titles and our job to knock them down to size, if we can. That takes sustained moderator attention.
That's not to criticize the community. HN's system consists of community, software, and moderation, and the community is by far the most valuable of the three. But all three must be active in order to keep HN from deteriorating (or at least to stave it off - https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...). Moderation's job isn't to determine discussion, it's to serve the community by jiggling the system out of its failure modes when it gets stuck in one of them.