>>55300368In Japan anime is a lot more normalized. Even normies watch anime, and so normie vtubers make a lot more sense and people aren't necessarily that into anime/manga/visual novels/idols (anything associated to Akihabara-type subculture).
In the west, anime is a lot more niche and is generally not palatable to normies except very surface level Netflix-tier anime and shounen series. Once you get to anime like Oreimo or PreCure is where normies draw the line, and Hololive is past that line that normies don't cross. So most Hololive fans in the west are already deep into enjoying shit like Oreimo, Umineko, Vocaloid, etc.
NijiJP makes sense. Hololive and HoloEN makes sense. But NijiEN is a strange existence. Because it is like a middle ground between the Oreimo/idol audience and the normies. This is typically a transitory state someone goes through, which can be observed through its viewership numbers.