the concept of duplicate communities in general seems extremely based in reddit culture in general and seems antithetical to what makes the fediverse interesting- in reality theres no such thing as 'duplicate' communities, and having redundancy, competition and options is nothing but a good thing for user experience
communities with the same name across different instances are ultimately still different communities, regardless of how much overlap there is regarding content or users
needing one of them to 'win', or more importantly, needing all the others to 'lose' seems like arbitrary tribalism for no real reason other than mimicking the reddit experience
appreciate the duplicate communities for what they are or might become- slightly different flavours of the same base concept that you can pick based on which one you vibe with most