>>1711362Japan's had popular male vtubers since basically the beginning. Baacharu, Inui, you could count Noja Loli Ojiisan. Nijisanji's men never did bad, they just did worse than the most successful girls but Toya held fine against the second wave.
It's not like I don't think Nijisanji or Holostars couldn't make a successful guy but the resources that go into debuting a man is the same as debuting a girl. It's not a problem of risk, if they debut a guy they make some cash on the side and call it a day, but they can just add another girl and make a ton of cash easy.
The reason they usually have a male in every batch is that men do fine in other regions, but screencap this, Nijisanji won't have any men in their first batch.