Think it is a bit of a trend to have the title as a very barebones description of the setting/plot and one reason for it could be that it makes it easier to connect the name to the story (which is quite helpful for those who read loads of ongoing stories, sometimes on multiple platforms, especially if they let the chapters build up to be able to binge several chapters).
Also not uncommon for the long titles to be abreviated a lot of the time (frequently seen with anime i think) so the long official title isnt that problematic in those cases
