It does not say that someone who did not go to a top school performs more poorly. It does not say that those who did not graduate from a top school are not good enough. All it says is that from a relative starting point, if you graduate from e.g. Harvard, you are more likely to be successful than if you did not.
My nitpicks with this premise are: is success defined in financial terms? Is it in position (CEO vs engineer)? What is the empirical evidence that graduating from a top school confers greater success (I think that there is such data, but citing it would be nice). There's enough stuff here to talk about that I am somewhat flabbergasted that you took this as a personal affront and misconstrue what's actually being talked about.
These seem like they’re saying the same thing. If people like me were considered “good enough” OP wouldn’t have said that to begin with and CC to state school would have been fine
How are you even defining prestigious? Am I incapable of doing so? Please explain.
You might work at Amazon - that's fine - congrats. I'm saying that it's /more difficult/ to get there on average than if you had gone to Stanford. You're more likely to get overlooked for another candidate who has all the same credentials you do but went to Stanford instead of generic school.
Just because you did it does not mean that it's a completely level playing field.
Are you sure? Where exactly did you go?