If Harvard is anything like Oxford and Cambridge in the UK, it's not just that you didn't expose yourself, elite universities have their own stratification, bet

If Harvard is anything like Oxford and Cambridge in the UK, it's not just that you didn't expose yourself, elite universities have their own stratification, between ones born rich who went to the most elite of private schools _before_ they went to university, where they likely _arrived_ with some connections already, and the ordinary public who got in through work and talent but can have anywhere from that level to absolutely nothing in terms of pre-existing connections and the learned social behaviours to then get them.