The more time someone spends talking to a variety of community members (and potential future members), the more likely they are to have an accurate view of which norms will best encourage the community’s health and flourishing.
Correctness is not a popularity contest, it feels like this is an intellectual laundering of groupthink. Also, if you promote a particular view, that *changes* who is going to be a member of the community in the future, as well as who is excluded.
For example, the EA community has decided to exclude Robin Hanson and be more inclusive towards Slate journalists and people who like the opinions of Slate; this defines a future direction for the movement, rather than causing a fixed movement to either flourish or not.
One ought to invite a speaker who has seriously considered the possibility that blackmail might be good in certain circumstances, written blog posts about it etc.
https://www.overcomingbias.com/2019/02/checkmate-on-blackmail.html