>>107324164If you want the actual reason, it's that unicorns assume these sorts of collabs with IRL entertainers are carefully managed, corpo-organised events where the talent does not meet with the men involved or have an ongoing working relationship with them (and if they do, it's all done via management)
Collabs with male vtubers, on the other hand, are more likely to be organised by the talents themselves and it's assumed they could have an ongoing relationship via adding each other on Discord. Collabs between vtubers happen all the time and are not some special formal event facilitated entirely by management.
There's also the perceived NTR issue with male vtuber collabs where they could have great chemistry and cuck the chat that way.
Now you could say that some male vtuber collabs happen in management-organised events and unicorns still lose their shit, but there's still the idea that vtubers exist in the same world, same industry etc. whereas other entertainers do not.
Does this logic really hold up? No, not really. No one ever said unicorns were rational creatures. If you're a gachikoi you're Schrodinger's Cuck. You're in a superposition of getting cucked and not getting cucked until a measurement event occurs (LLD, male vtuber collab, dox revealing a boyfriend/husband). Like Schrodinger's Cat, you're absolutely dead, or cucked in this case, but it takes a specific kind of event to know you're determinately cucked.