I feel it should be pointed out that if the industry you're in is showing up as unaffected by the eliteness of your school, then it's covering the three factors

I feel it should be pointed out that if the industry you're in is showing up as unaffected by the eliteness of your school, then it's covering the three factors you describe. If you get the same salary then all that networking either didn't actually happen or didn't actually have any impact on your bottom line.