i don't think his logic holds - earth 42 was supposed to have a spiderman, but the world didnt collapse because canon got disrupted
so it seems like it is actually Incursions (dimension hopping) causing the worlds to collapse
either miguel knows his theory is wrong and is lying, or what is most likely is that he is following orders from a spiderman higher in the hierarchy
the only missing spiderman that could be a "villain" who enforces traumatic events that shaped a hero would be superior spiderman imo .... Doc Ock was influenced to be a hero after experiencing peter's memories, it would make sense that he thinks they are necessary for spider people to become heroes
him presenting/looking like peter while being pragmatic like doc ock could convince miguel he is the "leader" of the spider people
only thing is it feels like it would be a lot to add on top of the conflict with The Spot, and existing story arcs to wrap up ...
I could see Silk, Madame Web and MCU Spiderman all making cameos in the 3rd too