>>109443236Ben was taught him life lessons, yes, but he didn't teach him how to web swing, or how to fight, or how to use his powers. Peter had to figure those out on his own, had to make his own name, had to make his own costume. Peter started from nothing and grew into Spiderman.
Miles comes out and has super unique spider powers that no other Spiderman has, gets a direct mentor, gets a mantle passed and all that. He didn't remotely earn it.
