>>536359824
After people found out it was a vtuber they shared your sentiment. And confusion.
The true answer as to why they couldn't/wouldn't do that was because Iruha (and the unrevealed second Nexon Vtuber) was supposed to be game aganostic and would play all of their Nexon offerings. They couldn't make it directly BA related because it wasn't supposed to cater to BA. They wanted to use BA, as their most popular offering at the time, to be their base to shill non-BA content.