Koi are still carp, same as goldfish. Carp are notably gross and have enormous impacts on their environments.
Hyenas are dogs, and some dogs are also very clean and productive. But a hyena in the US wild would certainly be called out as “A disgusting, dangerous invasive species that comes from Africa”. A comparison to a Golden Retriever wouldn’t be drawn, but surely people can understand what I mean.
Let’s hear you unload your trash talk on bonsai. That is an art form that is delicate, evocative, and very beautiful. I’m sure you can find something gross about it, though. After all, everything from Asia is “horrible,” right?