No other Spider-man?
Miles is a Spider-Man who wants to prevent his canon event. What I didn't understand was that since the foundation of the Spider Society and present day, in the movie, had there been no other Spider-Man who faced a similar dilemma to save or not save the police captain? The possible scenarios are
For Spider-Men (at the Spider Society) whose 'police captain death' canon hadn't happened yet, each of them just accept their fate? Sounds like a stretch
A recruitment criteria for being in the Spider Society potentially could be that your canon events need to have happened already. But while Gwen's case of being an exception was shown, Pavitra Prabhakar was a Spider-Man whose police death canon happened afterwards. So the recruitment criteria theory gets ruled out (But then then what's the criteria? Coz some folks will have police officers close to them die in the future if not already. And they would rebel. Sure, not all, but Miles can't be the only rebel ever)
Miles was the first one to face a dilemma to rebel against the system. Sure. The Spider Society was a recently established organisation, and only a handful of Spider-Men had been recruited (across the infinite Spiderverse with infinite Spider-men - any number is too small in front of infinite), so he just happened to be the first guy to fight back. But if the Spiderverse is infinite, wouldn't there be more "rebels"? Anomalies or not. And since it is spread across the time dimension too, the Spiderverse would have rebels in the past who successfully rebelled (again, infinite timelines, infinite possibilities). What was Miguel's longer term plan here? To hunt people in the past, whose universes were clearly stable in present day? Or even if just the present, he should know he cannot even theoretically prevent all rebels
There had to have been others