I'm not sure I find much meaning in this essay because everyone's definition of "conventional" and "independent" depends on their own bias. PG's own definition of independently minded seems to be "they have all the new ideas". If that's the case, then universities are absolutely a place of independently minded people when compared to the baby boomers and older generations.
Speaking out against racism, bigotry, and systemic issues that overwhelmingly impact POC and the LGBTQ+ community is not what I consider "conventionally minded" and definitely counts as a "new idea" when viewing it through the lens of racism and homophobia in America since its inception. As others posted, it's not clear to me what PG is referring to as conventionally minded at universities, but the issues I mentioned are typically at the forefront of political issues at schools these days.
Here's what I find conventionally minded thinking: supporting capitalism and accumulating ridiculous amounts of wealth without guilt. If you're the type of person who sees an abnormally high level of sociopaths in non-profits[1] and honestly believes the "defining quality of nonprofits is to make no profit, not to do good" has any significant basis in reality, perhaps that says more about your bias against non-profits than it does about the people in it. And that bias, to me, reeks of conformity.
1: https://twitter.com/paulg/status/1124254508232663040