I’m a Research Fellow at Open Philanthropy, though all views I express here are my own.
Before OP I was an independent researcher in global health and biosecurity, and a Charity Entrepreneurship incubatee. I have an MD and undergrad degrees in philosophy, international relations, and neuroscience, all from the University of Sydney.
Yes ‘cultivate’ is too strong—but the rate of speakers of this kind is way above what one would expect just from the happenstance crossover of interests. Like my guess here is that some subset of the organisers has significant interest in those communities and proactively seeks to add speakers from them. There are speakers/panellists whose connection to any of the Manifest topics are tenuous, and there are other fields with tenuous connections which are not drawn on much by Manifest—e.g. formal risk analysis, actuarial studies, safety engineering, geopolitics, statistics. All that to say there appears to be at least some predilection for edgelordism, above and beyond any coinciding of interests.