I don't understand why people differentiate between prologue and chapter 1? For me, prologue is chapter 1. Prologue is not just a promotional tool, but in my view, prologue is a moral premise that represents an arc. If a novel (series) is divided into several arcs, then each arc has its own moral premise explained in the prologue. So what's the difference with the synopsis? The synopsis becomes the moral premise for the entire series. While the prologue only represents the moral premise of the arc. This is my view and I don't know other people's views.
Hm.....i guess you didnt see a good enough prologue. Or a prologue that isnt obvious enough to scream in the face of readers "I AM A PROLOGUE TO INTRODUCE DETAILS BEFORE THE MAIN STORY START ! AND IM TOTALLY DIFFERENT THAN THE MAIN STORY !".
(btw not criticizing you nor mocking, just caps for importance and how obvious it should be. Also now i think about it, its true that nowadays i didnt see a lot of prologues like that)
Basically imagine this. Its a story about a policeman or killer. (dont criticize i will totally invent/plagiarize this on the spot and i sucks)
Prologue or ch0 if you prefer, you get the pov of a man running away, sweating, saying : if i cant escape i will die ! he will kill me !
his leg is pierced by multiple thrown daggers
he sees a shadow approach
eyes dilate seeing it
dies before he can says anything
the mysterious man say : target eliminated.
and goes away.
While the dead man eyes reflect the face of its killer, a person with a mole under its eyes.
Ch1
Police department.
Hello chief ! said a bunch of people as XXXXX walked through the corridors of the police station.
Handsome as ever chief! said a woman seeing XXXXX pass by, while smiling at him. Looking at its charming face. Beautiful eyes and one mole under one of them.
XXXX smiling sunnily replies : You too #####. Still as beautiful as ever.
and continue walking to his office.