You conveniently left out the justification for that statement: because the author believes monocultures are bad, and doesn't want to support them. I think that's entirely reasonable, and characterizing it as "goth subculture" is dishonest.

Chatgpt can turn one into the other. But that doesn't mean they are the same thing.

You are right to be mindful of the similarities. But it could be a mistake to be dismissive of the deeper thinking that might be behind the statement if it isn't just AI spew.

Being popular makes something a high value target. I think it's quite reasonable to have a threat model which avoids such things.