The origin story above is what not true? Marvel wiki says he got his powers from Oscorp and his uncle thieving.Where does PP fit in?
Oscorp created the spiders that bit Peter in the ultimate universe. Miles' uncle robbed Oscorp and one of those spiders got in his bag and bit his nephew when he got home. So miles had these powers and discovered them around the same time Peter was killed by the green goblin and of course at this point, the world now knows Peter Parker was spider man. Miles discovers that his powers are the same as Pete's but only decides to use them after doing research on Pete, going to his funeral, seeing the impact he had on people and their lives and decides to buy a spider man Halloween costume and play spider man, which prompts MJ, Gwen, Aunt May and shield to intervene.
Miles' whole reason for being spider man is because he looks up to Peter and wants to do as good of a job as he did and make him proud, not soil the memory, and also make Pete's family proud. He doesn't even take up the mantle without May's blessings and Gwen gives him the webshooters which is her way of giving her blessing.
That's what I mean when I say Miles needs Peter in order to exist because that's his motivation; that's the thing he's trying to achieve. Peter to him is what Ben is to Peter and to rob miles of that motivation and character building would be a shame and undercut the character.