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<p>Except that your attempts to influence hiring practices that currently overvalue HYPSM are unlikely to have any effect from the outside.</p>
<p>On the other hand, if you go to HYPSM and get hired into an investment bank, and later are in a position to hire, you might be able to send recruiters to (for example) Cal Poly, Virginia Tech, Penn State, etc. to hunt for recruits without having to compete so much against other investment banks that are all recruiting only at HYPSM.</p>
<p>Granted, the chance of that is pretty small, but higher than the zero chance of you having an influence if you never get hired at an investment bank because you did not go to HYPSM.</p>