There was ALREADY evidence against this...the fact the Borg existed after Data made them sleep and destroyed their ship in BOBW would leave one to believe the Borg would not commit the fatal (and stupid--for any advanced race) mistake of having all their eggs in one basket..so to speak.
All this 'evidence' was known to Picard/Data/etc. And they also had an incomparably better understanding of borg tech than our shalllow information.
And yet, in 'I, Borg', Picard&co HAD NO DOUBT the paradox would have worked!
In his subjective forum, Picard INTENDED
to condemn to death and assimilation TRILLIONS, despite being certain that he can save them! Essentially, Picard intended to be accessory to GENOCIDE on an enormos scale!
All that so that he won't have to 'use' a single person, Hugh, to destroy his 'culture' - as I said, the episode could even be interpreted in the sense that the paradox would only shut down the hive mind, liberating the drones.
All that so Picard can delude himself, when he watches himself in the mirror, that he always took the perfect moral choice, choosing to ignore the blood of uncountably many that stains his hands, his conscience.
Intending to be an accessory and actually doing it are two different things...the very question is if he made the right choice, and quite frankly its "yes".
As I pointed out before...he could also very well have saved billions of future lives by making the choice..billions of assimilated lives.
"Intending to be an accessory and actually doing it"
RAMA, Picard intended to do it and DID IT. This was NOT just a thought, it was materialized in his actions, RAMA.
Picard CONDEMNED TRILLIONS.
He refused to help then, even though he was certain he could have:
'If you see a killer murdering a classroom full of children and you are certain you can stop this killer with no risk to yourself, and yet you don't lift a finger, just watching the scene, YOU ARE IN PART RESPONSIBLE FOR THE CHILDREN'S DEATH, BECAUSE YOU COULD PREVENT IT AND YOU DIDN'T! You are monstruous!'
'About saving drones:
It was proven theoretically possible.
Practically, it is impossible. When Starfleet is able to save BILLIONS of drones, then it would be possible.
Starfleet trying to stop the borg by saving drones will end in the federatioin being assimilated. Facing the borg and prevailing is already nearly impossible; facing them when encumbered by such a severe limitation will only end in your death.
And since you argue that Starfleet can't touch the borg because they can be saved, then you argue that starfleet had no right to touch a single jem'hadar during the dominion war - like the technologically conditioned drones, the jem'hadar were biologically conditioned, they also had no choice. Yes?'