I think the reason is that if the elites are immoral, conniving sociopaths then admitting that they are means that either one is elite and in cahoots or that one is not elite - status-signalling, in short.
Higher-status people are also more likely to have brushed by elite institutions and would be diminished by mere association, so better to brush it under the carpet - and how better than by mocking low-status 'conspiracy theorists' and claiming that their suspicion is mere resentment.
Having read the article now, this 'innate impulse to trust the mother ' was actually exploited by the government when it entranced the nation into lockdown: the citizenry were grounded by daddy Boris in order to protect mummy NHS, an experience that can be much more easily tolerated psychologically if one happily takes on the role of the helpless infant.