Not quite useless. POST tells the server to check for a body which I think is a reasonable indication of intent. But otherwise, yes, it’s all arbitrary and just vague hints to the server program as to what you might possibly be thinking of doing…
Can verify this having been woken up more than once by a -very- attention getting earthquake alarm on my or my employer’s iPhone. A contender for Most Shock and Awe in a single notification.
!!Con 2015 - Kevin Lynagh: I made a cell phone! (DON'T TELL THE FCC KTHX!)
https://youtu.be/FlRa-iH7PGw?si=8OlGBQNcQRo_biuU