Is the gender of the central borg important like with bees?They need a coordinating leader for the hive but I don't see why that leader needs to be female. Even if the female hormones were amping something up plenty of assimilated race wouldn't even have the same hormone receptivity.
The Borg Queen is a mind that is formed from all the drones being connected together, just the way that your mind is formed from all your brain cells connected together.
By itself a brain cell has no gender identity, and neither does a drone.
But when you connect a lot of brain cells together, it forms a mind that DOES have a gender identity.
Likewise, the mind formed from all the drones connected together, has a gender identity, and it is female. The Borg Queen. There is no Borg King because there are no drones available to form another mind. All the drones available are being used as part of the Queen's mind.
And we know it's a female mind because every single time it's chosen to use a body to represent itself (controlling it like a puppet), it has chosen a female body.
(That's how the Queen keeps surviving - the body may be destroyed, but the mind is safely spread across the entire Collective.)