I take these excuses with a grain of salt anyway. I mean yeah, it's plausible, but just difficult to believe.
Put it this way: Polka and Roberu collaborated in a New Years' celebratory Among Us stream on Dec. 31 on their NND accounts. These people go way back, and swim in surprisingly small circles. Yet their Holostars/Hololive personas? Nothing, not even an indication Polka will ever interact with a male v-tuber.
For Noel in particular, who claims that someone else signed her up and she passed the first interview, it may be true that she has no NND experience and has never collaborated with a man online. But there's also a very real blockade somewhere either in the web of policy or in trying to keep the unicorns happy that may cause these excuses to arise.