I responded thus:Why did the Borg not send two cube ships when the Federation only narrowly defeats one (after all, they appear to have plenty)?
In the movie Star Trek: First Contact, the Borg send one cube ship to destroy Earth/The Federation. Since they have plenty of ships, as shown in the Voyager episode "Endgame", why not simply send two or more since the Federation struggles so much with one cube?
They could easily just send a few cubes and then a large amount of space would come under their control along with the Federation's technology and manpower as they assimilate the citizens.
The various explanations about logistics are, when examined, ultimately specious. The difference between one and two cubes, when you have the immense resources the Borg Collective has at its disposal, is negligible.
There are only three explanations that really make sense.
One: The Borg are trying to fatten up humanity. By sending only one cube, they force the Federation to grow stronger and more resourceful. Then, when the Borg come en masse, the “meal” will be far more nutritious and satisfying. Perhaps there are civilizations all over the galaxy that the Borg handle in this fashion … and all of them think they’re “special” for resisting the Borg—until dinner time, that is.
Two: The various godlike entities in the galaxy—the Q, the Organians, the Metrons, the Douwd, et alii—all of whom are so far beyond the Borg in power that they could easily obliterate the entire collective with a single determined thought (as a Douwd did to the Husnak), are not allowing the Borg to come at the Federation en masse, for reasons of their own. Perhaps they see potential in humanity that they don’t wish the Borg to ruin via complete assimilation.
Three: The Borg are afraid for/of humanity. They sense, somehow, that mankind holds the key to their survival and evolution/defeat and destruction, but assimilating individual humans hasn’t done the trick. So they’re carefully studying the problem, one cube and/or a few humans at a time, trying to figure out what makes us special, and knowing that assimilating us seems to destroy or at least suppress it.
I think the Borg are an evolutionary dead end, in that what they want is ultimately beyond their comprehension, because it’s not physical, but rather metaphysical. They can continue to absorb information from various cultures, societies and civilizations, but by assimilating them and suppressing their individuality and creativity, they’re killing the very spark that would eventually enable them to transcend their physical limitations and evolve into beings who need no physical form to survive. They’re their own worst enemy.
The Borg are the Tower of Babel personified. No matter how high they build, they’ll never reach Heaven.