I’ve spotted a few people here (possibly a majority) that would prefer general interest topics like politics or ethics, for example, were limited/avoided in order that we can focus specifically on Monzo-related chat (which is obviously what this forum was designed for).
On the forums I run (built using the same software), I created “opt in” categories for general interest discussion - things like politics, for example. This means that political chat doesn’t appear on the homepage unless a user has specifically chosen to opt in to see it.
Setup-wise, I used publicly-joinable groups to allow users to opt in, and then security settings to make certain categories visible to those users.
If @admins are interested in setting this up here, I’d be happy to help out in any way I can.